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Wicht J, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Bay A, Belous K, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Goldenzweig P, Golob B, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki Y, Kah DH, Kaji H, Kang JH, Kapusta P, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Kumar R, Kuo CC, Kwon YJ, Lange JS, Lee J, Lee JS, Lee SE, Lesiak T, Limosani A, Lin SW, Liu Y, Liventsev D, Mandl F, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney GR, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schneider O, Schümann J, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shiu JG, Shwartz B, Singh JB, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Tsuboyama T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Usov Y, Varner G, Vervink K, Villa S, Wang CH, Wang P, Wang XL, Watanabe Y, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Yusa Y, Zhang ZP, Zhilich V, Zupanc A, Zwahlen N. Observation of B_(s)(0)-->phigamma and search for B_(s)(0)-->gammagamma decays at Belle. PHYSICAL REVIEW LETTERS 2008; 100:121801. [PMID: 18517854 DOI: 10.1103/physrevlett.100.121801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2007] [Indexed: 05/26/2023]
Abstract
We search for the radiative penguin decays B_{s}{0}-->varphigamma and B_{s}{0}-->gammagamma in a 23.6 fb{-1} data sample collected at the Upsilon(5S) resonance with the Belle detector at the KEKB e{+}e{-} asymmetric-energy collider. We observe for the first time a radiative penguin decay of the B_{s}{0} meson in the B_{s}{0}-->varphigamma mode and we measure B(B_{s}{0}-->varphigamma)=(57_{-15}{+18}(stat)-11+12(syst))x10{-6}. No significant B_{s}{0}-->gammagamma signal is observed and we set a 90% confidence level upper limit of B(B_{s}{0}-->gammagamma)<8.7x10{-6}.
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Nakahama Y, Sumisawa K, Adachi I, Aihara H, Aushev T, Bakich AM, Balagura V, Barberio E, Bedny I, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Golob B, Ha H, Haba J, Hara K, Hara T, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kah DH, Kaji H, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee J, Lee JS, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liventsev D, Mandl F, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Park KS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Schwanda C, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Shwartz B, Singh JB, Somov A, Stanic S, Staric M, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Tsuboyama T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Ushiroda Y, Varner G, Vervink K, Wang CH, Wang P, Wang XL, Watanabe Y, Won E, Yamashita Y, Yusa Y, Zhang ZP, Zupanc A, Zyukova O. Measurement of time-dependent CP-violating parameters in B(0)-->K_(S)(0)K_(S)(0) decays. PHYSICAL REVIEW LETTERS 2008; 100:121601. [PMID: 18517853 DOI: 10.1103/physrevlett.100.121601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Indexed: 05/26/2023]
Abstract
We report a measurement of the CP-violating parameters in B;{0}-->K_{S}{0}K_{S}{0} decays based on a data sample of 657x10{6} BB[over ] pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e;{+}e{-} collider. In this Letter, one neutral B meson is fully reconstructed in the B;{0}-->K_{S}{0}K_{S}{0} decay mode, and the flavor of the accompanying B meson is identified by its decay products. The CP-violating parameters are measured from the asymmetry in the distributions of the proper-time interval between the two B decays: S_K_{S}{0}K_{S}{0}}=-0.38_{-0.77}{+0.69}(stat)+/-0.09(syst) and A_{K_{S}{0}K_{S}{0}}=-0.38+/-0.38(stat)+/-0.05(syst).
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Chen KF, Hou WS, Shapkin M, Sokolov A, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Bay A, Belous K, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Chistov R, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Golob B, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hsiung YB, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kah DH, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lange JS, Lee JS, Lee MJ, Lesiak T, Limosani A, Lin SW, Liu Y, Liventsev D, Mandl F, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shen CP, Shibuya H, Shiu JG, Shwartz B, Somov A, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Vervink K, Villa S, Wang CC, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Wedd R, Wicht J, Won E, Yabsley BD, Yamashita Y, Yamauchi M, Yuan CZ, Yusa Y, Zhang CC, Zhang ZP, Zupanc A. Observation of anomalous upsilon(1S)pi+pi(-) and upsilon(2S)pi+pi(-) production near the upsilon(5S) resonance. PHYSICAL REVIEW LETTERS 2008; 100:112001. [PMID: 18517777 DOI: 10.1103/physrevlett.100.112001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2007] [Indexed: 05/26/2023]
Abstract
We report the first observation of e;{+}e;{-}-->Upsilon(1S)pi;{+}pi;{-}, Upsilon(2S)pi;{+}pi;{-}, and first evidence for e;{+}e;{-}-->Upsilon(3S)pi;{+}pi;{-}, Upsilon(1S)K+K-, near the peak of the Upsilon(5S) resonance at sqrt[s] approximately 10.87 GeV. The results are based on a data sample of 21.7 fb;{-1} collected with the Belle detector at the KEKB e;{+}e;{-} collider. Attributing the signals to the Upsilon(5S) resonance, the partial widths Gamma(Upsilon(5S)-->Upsilon(1S)pi;{+}pi;{-})=0.59+/-0.04(stat)+/-0.09(syst) MeV and Gamma(Upsilon(5S)-->Upsilon(2S)pi;{+}pi;{-})=0.85+/-0.07(stat)+/-0.16(syst) MeV are obtained from the observed cross sections. These values exceed by more than 2 orders of magnitude the previously measured partial widths for dipion transitions between lower Upsilon resonances.
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Brodzicka J, Palka H, Adachi I, Aihara H, Aulchenko V, Bakich AM, Barberio E, Bay A, Bedny I, Bitenc U, Bondar A, Bracko M, Browder TE, Chang MC, Chang P, Chen A, Chen WT, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi SK, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Go A, Gokhroo G, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lange JS, Lee JS, Lee MJ, Lee SE, Lesiak T, Limosani A, Liventsev D, Mandl F, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mori T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Pestotnik R, Piilonen LE, Rozanska M, Sakai Y, Schneider O, Seidl R, Sekiya A, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Vervink K, Villa S, Vinokurova A, Wang CC, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan CZ, Yusa Y, Zhang CC, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A, Zwahlen N. Observation of a new DsJ meson in B+-->D0D0K+ decays. PHYSICAL REVIEW LETTERS 2008; 100:092001. [PMID: 18352700 DOI: 10.1103/physrevlett.100.092001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Indexed: 05/26/2023]
Abstract
We report the observation of a new DsJ meson produced in B+-->D0DsJ-->D0D0K+. This state has a mass of M=2708+/-9(-10)(+11) MeV/c2, a width Gamma=108+/-23(-31)(+36) MeV/c2 and a 1- spin-parity. The statistical significance of this observation is 8.4 sigma. The results are based on an analysis of 449 x 10(6) BB events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
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Pakhlova G, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bedny I, Belous K, Bitenc U, Bondar A, Bracko M, Brodzicka J, Browder TE, Chen A, Chen WT, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Golob B, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kang JH, Kawasaki T, Kibayashi A, Kichimi H, Kim HJ, Kim HO, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee MJ, Lee SE, Lesiak T, Lin SW, Liventsev D, Mandl F, Marlow D, McOnie S, Medvedeva T, Miyake H, Mizuk R, Mohapatra D, Moloney GR, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Park H, Park KS, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Schneider O, Schwanda C, Senyo K, Shapkin M, Shen CP, Shibuya H, Shiu JG, Shwartz B, Singh JB, Somov A, Stanic S, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Usov Y, Varner G, Vinokurova A, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan CZ, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Observation of the psi(4415)-->DD2*(2460) decay using initial-state radiation. PHYSICAL REVIEW LETTERS 2008; 100:062001. [PMID: 18352457 DOI: 10.1103/physrevlett.100.062001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2007] [Indexed: 05/26/2023]
Abstract
We report measurements of the exclusive cross section for e(+)e(-)-->D(0)D(-)pi(+) over the center-of-mass energy range 4.0 GeV to 5.0 GeV with initial-state radiation and the first observation of the decay psi(4415)-->D(0)D(-)pi(+). From a study of the resonant substructure in psi(4415) decay we conclude that the psi(4415)-->D(0)D(-)pi(+) decay is dominated by psi(4415)-->DD(2)(*)(2460). We obtain B(psi(4415)-->D(0)D(-)pi(nonresonant)(+))/B(psi(4415)-->DD(2)(*)(2460)-->D(0)D(-)pi(+))<0.22 at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb(-1).
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31
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Ushiroda Y, Sumisawa K, Taniguchi N, Adachi I, Aihara H, Arinstein K, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Cho IS, Choi Y, Dalseno J, Dash M, Eidelman S, Epifanov D, Gabyshev N, Golob B, Ha H, Haba J, Hara K, Hara T, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hyun HJ, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki Y, Kah DH, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee MJ, Lee SE, Lesiak T, Lin SW, Liventsev D, Mandl F, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney GR, Nagasaka Y, Nakao M, Nakazawa H, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Pakhlov P, Pakhlova G, Park CW, Park H, Peak LS, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Schümann J, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tikhomirov I, Trabelsi K, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Villa S, Wang CC, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang ZP, Zupanc A, Zyukova O. Time-dependent CP-violating asymmetry in B0-->rho0gamma decays. PHYSICAL REVIEW LETTERS 2008; 100:021602. [PMID: 18232853 DOI: 10.1103/physrevlett.100.021602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2007] [Indexed: 05/25/2023]
Abstract
We report the first measurement of CP-violation parameters in B0-->rho0gamma decays based on a data sample of 657x10(6)BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the time-dependent and direct CP-violating parameters, Srho0gamma=-0.83+/-0.65(stat)+/-0.18(syst) and Arho0gamma=-0.44+/-0.49(stat)+/-0.14(syst), respectively.
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Chen KF, Adachi I, Aihara H, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Bay A, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Cheon BG, Chiang CC, Cho IS, Choi Y, Choi YK, Cole S, Danilov M, Dash M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi NJ, Kajiwara S, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee JS, Lee SE, Lesiak T, Lin SW, Liu Y, Liventsev D, Mandl F, Marlow D, Matyja A, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nagasaka Y, Nakamura I, Nakao M, Nishida S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shinomiya S, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Trabelsi K, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Villa S, Vinokurova A, Wang CC, Wang CH, Wang MZ, Wang P, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zupanc A. Search for B --> h(*)nunu[over ] decays at Belle. PHYSICAL REVIEW LETTERS 2007; 99:221802. [PMID: 18233279 DOI: 10.1103/physrevlett.99.221802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Indexed: 05/25/2023]
Abstract
We present a search for the rare decays B --> h(*)nunu[over ], where h(*) stands for a light meson. A data sample of 535 x 10{6} BB[over ] pairs collected with the Belle detector at the KEKB e{+}e{-} collider is used. Signal candidates are required to have an accompanying B meson fully reconstructed in a hadronic mode and signal side particles consistent with a single h(*) meson. No significant signal is observed and we set upper limits on the branching fractions at 90% confidence level. The limits on B{0} --> K{*0}nunu[over ] and B{+} --> K{+}nunu[over ] decays are more stringent than the previous constraints, while the first searches for B{0} --> K{0}nunu[over ], pi{0}nunu[over ], rho{0}nunu[over ], varphinunu[over ] and B{+} --> K{*+}nunu[over ], rho{+}nunu[over ] are reported.
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Tajima O, Hazumi M, Adachi I, Aihara H, Aulchenko V, Aushev T, Bakich AM, Barberio E, Bay A, Bedny I, Bhardwaj V, Bitenc U, Bozek A, Bracko M, Browder TE, Chang MC, Chang P, Chen A, Chen KF, Chen WT, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi Y, Choi YK, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Go A, Gokhroo G, Golob B, Haba J, Hayasaka K, Hayashii H, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kaji H, Kang JH, Kataoka SU, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lange JS, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Mandl F, Marlow D, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Nagasaka Y, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Schneider O, Sekiya A, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Villa S, Vinokurova A, Wang CC, Wang CH, Wang MZ, Wang P, Watanabe Y, Wedd R, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan CZ, Yusa Y, Zhang CC, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Search for the CP-violating decays Upsilon(4S)-->B0B0-->J/psiKS0+J/psi(etac)KS0. PHYSICAL REVIEW LETTERS 2007; 99:211601. [PMID: 18233206 DOI: 10.1103/physrevlett.99.211601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Indexed: 05/25/2023]
Abstract
We report the first search for CP-violating decays of the Upsilon(4S) using a data sample that contains 535 x 10(6) Upsilon(4S) mesons with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. A partial reconstruction technique is employed to enhance the signal sensitivity. No significant signals were observed. We obtain an upper limit of 4 x 10(-7) at the 90% confidence level for the branching fractions of the CP violating modes, Upsilon(4S)-->B(0)B(0)-->J/psiK(S)(0)+J/psi(eta(c))K(S)(0). Extrapolating the result, we find that an observation with 5sigma significance is expected with a 30 ab(-1) data sample, which is within the reach of a future super B factory.
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Matyja A, Rozanska M, Adachi I, Aihara H, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Bedny I, Bhardwaj V, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chen A, Chen KF, Cheon BG, Chistov R, Cho IS, Choi Y, Choi YK, Dalseno J, Dash M, Eidelman S, Fratina S, Gabyshev N, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki Y, Kaji H, Kajiwara S, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Kozakai Y, Krizan P, Krokovny P, Kumar R, Kuo CC, Kwon YJ, Lee JS, Lee SE, Lesiak T, Lin SW, Liu Y, Liventsev D, Mandl F, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nagasaka Y, Nakamura I, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shinomiya S, Shiu JG, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Trabelsi K, Uehara S, Unno Y, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell KE, Vervink K, Villa S, Wang CC, Wang CH, Wang P, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang ZP, Zupanc A. Observation of B(0)-->D(*-)tau(+)nu(tau) decay at Belle. PHYSICAL REVIEW LETTERS 2007; 99:191807. [PMID: 18233068 DOI: 10.1103/physrevlett.99.191807] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Indexed: 05/25/2023]
Abstract
We report an observation of the decay B{0}-->D{*-}tau{+}nu{tau} in a data sample containing 535x10{6} BB pairs collected with the Belle detector at the KEKB asymmetric-energy e{+}e{-} collider. We find a signal with a significance of 5.2sigma and measure the branching fraction B(B{0}-->D{*-}tau{+}nu{tau})=(2.02{-0.37}{+0.40}(stat)+/-0.37(syst))%. This is the first observation of an exclusive B decay with a b-->ctaunu{tau} transition.
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Wang XL, Yuan CZ, Shen CP, Wang P, Adachi I, Aihara H, Arinstein K, Aushev T, Bakich AM, Barberio E, Bedny I, Bhardwaj V, Bitenc U, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chen A, Chen KF, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi SK, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Go A, Gokhroo G, Ha H, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki Y, Kah DH, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Lange JS, Lee JS, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liu Y, Liventsev D, Mandl F, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mori T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Park KS, Pestotnik R, Piilonen LE, Poluektov A, Sahoo H, Sakai Y, Schneider O, Sekiya A, Sevior ME, Shapkin M, Shibuya H, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Villa S, Vinokurova A, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Observation of two resonant structures in e+ e- -->pi+ pi- psi(2S) via initial-state radiation at Belle. PHYSICAL REVIEW LETTERS 2007; 99:142002. [PMID: 17930661 DOI: 10.1103/physrevlett.99.142002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Indexed: 05/25/2023]
Abstract
The cross section for e+ e- --> pi+ pi- psi(2S) between threshold and sqrt[s]=5.5 GeV is measured using 673 fb(-1) of data on and off the Upsilon(4S) resonance collected with the Belle detector at KEKB. Two resonant structures are observed in the pi+ pi- psi(2S) invariant-mass distribution, one at 4361 +/- 9 +/- 9 MeV/c2 with a width of 74 +/- 15 +/- 10 MeV/c2, and another at 4664 +/- 11 +/- 5 MeV/c2 with a width of 48 +/- 15 +/- 3 MeV/c2, if the mass spectrum is parametrized with the coherent sum of two Breit-Wigner functions. These values do not match those of any of the known charmonium states.
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Go A, Bay A, Abe K, Aihara H, Anipko D, Aulchenko V, Aushev T, Bakich AM, Barberio E, Belous K, Bitenc U, Bizjak I, Blyth S, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Gorisek A, Ha H, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Jacoby C, Kang JH, Katayama N, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee J, Lee MJ, Lesiak T, Limosani A, Lin SW, Liu Y, Liventsev D, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Olsen SL, Onuki Y, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Peak LS, Pestotnik R, Peters M, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Shapkin M, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wicht J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang ZP, Zhilich V, Zupanc A. Measurement of Einstein-Podolsky-Rosen-type flavor entanglement in Upsilon(4S) --> B0 B0 decays. PHYSICAL REVIEW LETTERS 2007; 99:131802. [PMID: 17930575 DOI: 10.1103/physrevlett.99.131802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Indexed: 05/25/2023]
Abstract
The neutral B meson pair produced at the Upsilon(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B(0) decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B(0) and B(0) with definite flavor, we find a decoherent fraction of 0.029 +/ -0.057, consistent with no decoherence.
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Zhang LM, Zhang ZP, Adachi I, Aihara H, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chiang CC, Cho IS, Choi Y, Choi YK, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gokhroo G, Golob B, Ha H, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kaji H, Kajiwara S, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liu Y, Liventsev D, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Sahoo H, Sakai Y, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shinomiya S, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsuboyama T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Villa S, Vinokurova A, Wang CH, Wang MZ, Wang P, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan CZ, Zhang CC, Zhilich V, Zupanc A. Measurement of D0-D0 mixing parameters in D0 --> Ks pi+ pi- decays. PHYSICAL REVIEW LETTERS 2007; 99:131803. [PMID: 17930576 DOI: 10.1103/physrevlett.99.131803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2007] [Indexed: 05/25/2023]
Abstract
We report a measurement of D0-D(0) mixing parameters in D(0) --> K(s)(0) pi(+) pi(-) decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb(-1) of data accumulated with the Belle detector at the KEKB e(+)e(-) collider. Assuming negligible CP violation, we measure the mixing parameters x = (0.80 +/- 0.29(-0.07-0.14)(+0.09+0.10))% and y = (0.33+/-0.24(-0.12-0.08)(+0.08+0.06))%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q / p| = 0.86(-0.29-0.03)(+0.30+0.06) +/- 0.08 and arg(q/p) = (-14(-18-3-4)(+16+5+2)) degrees .
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Lin SW, Chang P, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Barberio E, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Dalseno J, Dash M, Dragic J, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Garmash A, Go A, Golob B, Ha H, Haba J, Hara T, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kapusta P, Kataoka SU, Kawai H, Kawasaki T, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuzmin A, Kwon YJ, Lee MJ, Lesiak T, Liventsev D, Macnaughton J, Mandl F, Matsumoto T, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Moloney GR, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wicht J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yusa Y, Zhang CC, Zhang ZP, Zupanc A. Measurements of branching fractions for B --> K pi and B --> pi pi decays. PHYSICAL REVIEW LETTERS 2007; 99:121601. [PMID: 17930495 DOI: 10.1103/physrevlett.99.121601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2007] [Indexed: 05/25/2023]
Abstract
We report measurements of branching fractions for B --> K pi and B --> pi pi decays based on a data sample of 449 x 10(6) BB[over] pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We also measure the ratios of partial widths for B-->Kpi decays, namely R(c) identical with 2Gamma(B(+) --> K(+) pi(0))/Gamma(B(+) --> K(0) pi(+)) = 1.08+/-0.06+/-0.08 and R(n) identical with Gamma(B(0) --> K(+) pi(-))/2 Gamma(B(0) --> K(0) pi(0)) = 1.08+/-0.08+/-0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations.
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Belous K, Shapkin M, Sokolov A, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aulchenko V, Aushev T, Bakich AM, Barberio E, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Fujikawa M, Gabyshev N, Gershon T, Gokhroo G, Golob B, Ha H, Haba J, Hasegawa Y, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Kapusta P, Katayama N, Kawasaki T, Khan HR, Kichimi H, Kim YJ, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee J, Lee MJ, Lee SE, Lesiak T, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park H, Park KS, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Satoyama N, Schneider O, Schümann J, Seidl R, Senyo K, Sevior ME, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Suzuki SY, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Vinokurova A, Wang CH, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Measurement of the tau lepton mass and an upper limit on the mass difference between tau+ and tau-. PHYSICAL REVIEW LETTERS 2007; 99:011801. [PMID: 17678147 DOI: 10.1103/physrevlett.99.011801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Indexed: 05/16/2023]
Abstract
The mass of the tau lepton has been measured in the decay mode tau-->3pinutau using a pseudomass technique. The result obtained from 414 fb-1 of data collected with the Belle detector is Mtau=[1776.61+/-0.13(stat)+/-0.35(sys)] MeV/c2. The upper limit on the relative mass difference between positive and negative tau leptons is |Mtau+-Mtau-|/Mtau<2.8 x 10-4 at 90% confidence level.
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Mizuk R, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Danilov M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Kapusta P, Katayama N, Khan HR, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee J, Lee MJ, Lee SE, Lesiak T, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Miyake H, Miyata H, Miyazaki Y, Nakao M, Natkaniec Z, Nishida S, Ogawa S, Ohshima T, Okuno S, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park H, Park KS, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Satoyama N, Schneider O, Schümann J, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Suzuki SY, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CH, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan CZ, Zhang LM, Zhang ZP, Zhilich V, Zupanc A. Experimental constraints on the spin and parity of the Lambdac(2880)+. PHYSICAL REVIEW LETTERS 2007; 98:262001. [PMID: 17678081 DOI: 10.1103/physrevlett.98.262001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Indexed: 05/16/2023]
Abstract
We report the results of several studies of the Lambda(c)(+)pi(+)pi(-)X final state in continuum e(+)e(-) annihilation data collected by the Belle detector. An analysis of angular distributions in Lambda(c)(2880)(+)-->Sigma(c)(2455)(0,++)pi(+,-) decays strongly favors a Lambda(c)(2880)(+) spin assignment of 5/2 over 3/2 or 1/2. We find evidence for Lambda(c)(2880)(+)-->Sigma(c)(2520)(0,++)pi(+,-) decay and measure the ratio of Lambda(c)(2880)(+) partial widths Gamma(Sigma(c)(2520)pi)/Gamma(Sigma(c)(2455)pi)=0.225+/-0.062+/-0.025. This value favors the Lambda(c)(2880)(+) spin-parity assignment of 5/2(+) over 5/2(-). We also report the first observation of Lambda(c)(2940)(+)-->Sigma(c)(2455)(0,++)pi(+,-) decay and measure Lambda(c)(2880)(+) and Lambda(c)(2940)(+) mass and width parameters. These studies are based on a 553 fb(-1) data sample collected at or near the Upsilon(4S) resonance at the KEKB collider.
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Fratina S, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aushev T, Bakich AM, Barberio E, Bay A, Belous K, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Dash M, Drutskoy A, Eidelman S, Go A, Golob B, Gorisek A, Ha H, Haba J, Hara K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liventsev D, Mandl F, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Mori T, Nakano E, Nakao M, Nakazawa H, Nishida S, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsukamoto T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Villa S, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zupanc A. Evidence for CP violation in B0-->D+D- decays. PHYSICAL REVIEW LETTERS 2007; 98:221802. [PMID: 17677834 DOI: 10.1103/physrevlett.98.221802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Indexed: 05/16/2023]
Abstract
We report measurements of the branching fraction and CP violation parameters in B(0)-->D+ D- decays. The results are based on a data sample that contains 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain [1.97+/-0.20(stat) +/- 0.20(syst)] x 10(-4) for the branching fraction of B0-->D+D-. The measured values of the CP violation parameters are S=-1.13+/-0.37+/-0.09, A=0.91+/-0.23+/-0.06, where the first error is statistical and the second is systematic. We find evidence of CP violation in B0-->D+D- at the 4.1sigma confidence level. While the value of S is consistent with expectations from other measurements, the value of the parameter A favors large direct CP violation at the 3.2sigma confidence level, in contradiction to standard model expectations.
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Kusaka A, Wang CC, Ishino H, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Aushev T, Bakich AM, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Fratina S, Fujikawa M, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Ha H, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kakuno H, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee J, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liventsev D, Mandl F, Marlow D, Matsumoto T, Miyabayashi K, Miyake H, Miyazaki Y, Mizuk R, Mori T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park H, Park KS, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Satoyama N, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Villa S, Wang CH, Wang MZ, Watanabe Y, Wedd R, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Zhang LM, Zhang ZP, Zhilich V, Zupanc A. Measurement of CP asymmetry in a time-dependent Dalitz analysis of B0-->(rhopi)0 and a constraint on the quark mixing matrix angle phi2. PHYSICAL REVIEW LETTERS 2007; 98:221602. [PMID: 17677832 DOI: 10.1103/physrevlett.98.221602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Indexed: 05/16/2023]
Abstract
We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0-->pi+pi-pi0 decays based on a 414 fb(-1) data sample containing 449 x 10(6) BB pairs. The data was collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle phi2, 68 degrees < phi2 < 95 degrees as the 68.3% confidence interval for the phi2 solution consistent with the standard model (SM). A large SM-disfavored region also remains.
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Staric M, Golob B, Abe K, Abe K, Adachi I, Aihara H, Arinstein K, Aushev T, Aziz T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Bay A, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Cho IS, Choi SK, Choi Y, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gorisek A, Ha H, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Higuchi T, Hokuue T, Hoshi Y, Hou WS, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kapusta P, Katayama N, Kawasaki T, Kibayashi A, Kichimi H, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, Mandl F, Marlow D, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Pestotnik R, Piilonen LE, Poluektov A, Rozanska M, Sahoo H, Sakai Y, Satoyama N, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shen CP, Shibuya H, Shwartz B, Sokolov A, Somov A, Stanic S, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Varvell KE, Vervink K, Villa S, Vinokurova A, Wang CH, Wang MZ, Watanabe Y, Wicht J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yuan CZ, Yuan Y, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zupanc A. Evidence for D0-D0 mixing. PHYSICAL REVIEW LETTERS 2007; 98:211803. [PMID: 17677765 DOI: 10.1103/physrevlett.98.211803] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2007] [Indexed: 05/16/2023]
Abstract
We observe evidence for D(0)-D(0) mixing by measuring the difference in the apparent lifetime when a D(0) meson decays to the CP eigenstates K(+)K(-) and pi(+)pi(-) and when it decays to the final state K(-)pi(+). We find the relative difference of the lifetimes y(CP) to be [1.31+/-0.32(stat)+/-0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D(0) and D(0) decays; no evidence for CP violation is found. These results are based on 540 fb(-1) of data recorded by the Belle detector at the KEKB e(+)e(-) collider.
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Ishino H, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aushev T, Bakich AM, Barberio E, Barbero M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bozek A, Bracko M, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Dash M, Drutskoy A, Eidelman S, Fratina S, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara K, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Iwasaki Y, Kang JH, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kibayashi A, Kichimi H, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, MacNaughton J, Mandl F, Marlow D, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Nagasaka Y, Nakano E, Nakao M, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park H, Peak LS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shibuya H, Shwartz B, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Varvell KE, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Wu CH, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang LM, Zhang ZP, Zhilich V, Zupanc A. Observation of direct CP violation in B0 --> pi+pi- decays and model-independent constraints on the quark-mixing angle phi2. PHYSICAL REVIEW LETTERS 2007; 98:211801. [PMID: 17677763 DOI: 10.1103/physrevlett.98.211801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Revised: 02/14/2007] [Indexed: 05/16/2023]
Abstract
We report a new measurement of the time-dependent CP-violating parameters in B(0)-->pi(+)pi(-) decays with 535 x 10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating at the Upsilon(4S) resonance. We find 1464+/-65 B(0)-->pi(+)pi(-) events and measure the CP-violating parameters S(pipi)=-0.61+/-0.10(stat)+/-0.04(syst) and A(pipi)=+0.55+/-0.08(stat)+/-0.05(syst). We observe large direct CP violation with a significance greater than 5 standard deviations for any S(pipi) value. Using isospin relations, we measure the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle phi(2)=(97+/-11) degrees for the solution consistent with the standard model and exclude the range 11 degrees <phi(2)<79 degrees at the 95% confidence level.
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Lin SW, Chang P, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Dalseno J, Dash M, Dragic J, Eidelman S, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim YJ, Kinoshita K, Korpar S, Krizan P, Kulasiri R, Kuo CC, Kwon YJ, Lange JS, Lee J, Lee MJ, Lee SE, Lesiak T, Limosani A, Mandl F, Matsumoto T, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Mori T, Nakamura I, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Park KS, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Senyo K, Shapkin M, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zupanc A. Observation of B decays to two kaons. PHYSICAL REVIEW LETTERS 2007; 98:181804. [PMID: 17501563 DOI: 10.1103/physrevlett.98.181804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2006] [Revised: 03/15/2007] [Indexed: 05/15/2023]
Abstract
Using 449x10(6) BB[over ] pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B(+)-->K[over ](0)K(+) and B(0)-->K[over ](0)K(0) decays with 5.3sigma and 6.0sigma significance, respectively. We measure the branching fractions B(B(+)-->K[over ](0)K(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B(0)-->K[over ](0)K(0))=(0.87(-0.20)(+0.25)+/-0.09)x10(-6), and partial-rate asymmetries A(CP)(B(+)-->K[over ](0)K(+))=0.13(-0.24)(+0.23)+/-0.02 and A(CP)(B(0)-->K[over ](0)K(0))=-0.58(-0.66)(+0.73)+/-0.04. From a simultaneous fit, we also obtain B(B(+)-->K(0)pi(+))=(22.8(-0.7)(+0.8)+/-1.3)x10(-6) and A(CP)(B(+)-->K(0)pi(+))=0.03+/-0.03+/-0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B(0)-->K(+)K(-) decays, and for this branching fraction, we set an upper limit of 4.1x10(-7) at the 90% confidence level.
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Tajima O, Hayashii H, Hazumi M, Inami K, Iwasaki Y, Uehara S, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Bakich AM, Barberio E, Bedny I, Belous K, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Ha H, Haba J, Hayasaka K, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee J, Lee MJ, Lesiak T, Limosani A, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, McOnie S, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Mueller J, Nakamura I, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park H, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsuboyama T, Tsukamoto T, Uglov T, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wedd R, Wicht J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang ZP, Zhilich V, Zupanc A. Search for invisible decay of the Upsilon(1S). PHYSICAL REVIEW LETTERS 2007; 98:132001. [PMID: 17501190 DOI: 10.1103/physrevlett.98.132001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2006] [Indexed: 05/15/2023]
Abstract
We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)-->pi+ pi- Upsilon(1S) transition using a data sample of 2.9 fb-1 at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)-->invisible)<2.5 x 10(-3).
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Chang MC, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aushev T, Bakich AM, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Ha H, Haba J, Hara T, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Kataoka SU, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nagamine T, Nakamura I, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Park KS, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Shapkin M, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wedd R, Won E, Xie QL, Yamaguchi A, Yamashita Y, Yamauchi M, Yusa Y, Zhang CC, Zhang LM, Zhang ZP, Zupanc A. Observation of the decay B(0)-->J/psieta. PHYSICAL REVIEW LETTERS 2007; 98:131803. [PMID: 17501188 DOI: 10.1103/physrevlett.98.131803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2007] [Indexed: 05/15/2023]
Abstract
We report the first observation of B(0)-->J/psieta decay. These results are obtained from a data sample that contains 449 x10(6) BB[over] pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal with a significance of 8.1 sigma and obtain a branching fraction of (9.5+/-1.7(stat)+/-0.8(syst)) x 10(-6).
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Pakhlova G, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Cole S, Dalseno J, Danilov M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Kapusta P, Katayama N, Kawasaki T, Khan HR, Kichimi H, Kim YJ, Kinoshita K, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee J, Lee MJ, Lee SE, Lesiak T, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Park H, Park KS, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Satoyama N, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Suzuki SY, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CH, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Zhang CC, Zhang ZP, Zhilich V, Zupanc A. Measurement of the near-threshold e+e- --> D(*)+/-D(*)-/+ cross section using initial-state radiation. PHYSICAL REVIEW LETTERS 2007; 98:092001. [PMID: 17359149 DOI: 10.1103/physrevlett.98.092001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2007] [Indexed: 05/14/2023]
Abstract
We report a measurement of the exclusive e+e- -->D(*)+/-D*-/+ cross section as a function of center-of-mass energy near the D(*)+/-D*-/+ threshold with initial-state radiation. A partial reconstruction technique is used to increase the efficiency and to suppress background. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 547.8 fb(-1).
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Drutskoy A, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aulchenko V, Aushev T, Banerjee S, Barberio E, Barbero M, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Goldenzweig P, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Higuchi T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee J, Lee MJ, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, Macnaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Pakhlov P, Pakhlova G, Park H, Park KS, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Watanabe Y, Wiechczynski J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zupanc A. Measurement of inclusive Ds, D0, and J/psi rates and determination of the Bs(*)Bs(*) production fraction in bb Events at the Upsilon(5S) resonance. PHYSICAL REVIEW LETTERS 2007; 98:052001. [PMID: 17358846 DOI: 10.1103/physrevlett.98.052001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2006] [Indexed: 05/14/2023]
Abstract
The inclusive production of D(s), D(0), and J/psi mesons is studied using a 1.86 fb(-1) data sample collected on the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of bb events in this Upsilon(5S) data sample is determined. We measure the branching fractions B(Upsilon(5S)-->D(s)X)/2=(23.6+/-1.2+/-3.6)%, B(Upsilon(5S)-->D(0)X)/2=(53.8+/-2.0+/-3.4)%, and B(Upsilon(5S)-->J/psiX)/2=(1.030+/-0.080+/-0.067)%. From the D(s) and D(0) inclusive branching fractions the ratio f(s)=(18.0+/-1.3+/-3.2)% of B(s)(*)B(s)(*) to the total bb quark pair production at the Upsilon(5S) energy is obtained in a model-dependent way.
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Chen KF, Hara K, Hazumi M, Higuchi T, Miyabayashi K, Nakahama Y, Sumisawa K, Tajima O, Ushiroda Y, Yusa Y, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Balagura V, Banerjee S, Barberio E, Barbero M, Bay A, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Garmash A, Gershon T, Go A, Gokhroo G, Goldenzweig P, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kakuno H, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Leder G, Lee J, Lee MJ, Lesiak T, Li J, Limosani A, Lin SW, Liu Y, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney GR, Murakami A, Nagamine T, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wedd R, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zupanc A. Observation of time-dependent CP violation in B0 --> eta'K0 decays and improved measurements of CP asymmetries in B0 --> phiK0, KS0KS0KS0 and B0 --> J/psiK0 decays. PHYSICAL REVIEW LETTERS 2007; 98:031802. [PMID: 17358677 DOI: 10.1103/physrevlett.98.031802] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Indexed: 05/14/2023]
Abstract
We present improved measurements of CP-violation parameters in B(0) --> phiK(0), eta(')K(0), KS(0)KS(0)KS(0) decays based on a sample of 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2phi1(eff)=+0.64+/-0.10(stat)+/-0.04(syst) for B(0) --> eta(')K(0), +0.50+/-0.21(stat)+/-0.06(syst) for B(0) --> phiK(0), and +0.30+/-0.32(stat)+/-0.08(syst) for B(0) --> KS(0)KS(0)KS(0) decays. We have observed CP violation in the B(0) --> eta(')K(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B(0) --> J/psiK(0) decays and obtain sin2phi1=+0.642+/-0.031(stat)+/-0.017(syst).
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