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Yamamoto TO, Agnello M, Akazawa Y, Amano N, Aoki K, Botta E, Chiga N, Ekawa H, Evtoukhovitch P, Feliciello A, Fujita M, Gogami T, Hasegawa S, Hayakawa SH, Hayakawa T, Honda R, Hosomi K, Hwang SH, Ichige N, Ichikawa Y, Ikeda M, Imai K, Ishimoto S, Kanatsuki S, Kim MH, Kim SH, Kinbara S, Koike T, Lee JY, Marcello S, Miwa K, Moon T, Nagae T, Nagao S, Nakada Y, Nakagawa M, Ogura Y, Sakaguchi A, Sako H, Sasaki Y, Sato S, Shiozaki T, Shirotori K, Sugimura H, Suto S, Suzuki S, Takahashi T, Tamura H, Tanabe K, Tanida K, Tsamalaidze Z, Ukai M, Yamamoto Y, Yang SB. Observation of Spin-Dependent Charge Symmetry Breaking in ΛN Interaction: Gamma-Ray Spectroscopy of _{Λ}^{4}He. PHYSICAL REVIEW LETTERS 2015; 115:222501. [PMID: 26650298 DOI: 10.1103/physrevlett.115.222501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Indexed: 06/05/2023]
Abstract
The energy spacing between the spin-doublet bound state of _{Λ}^{4}He(1^{+},0^{+}) was determined to be 1406±2±2 keV, by measuring γ rays for the 1^{+}→0^{+} transition with a high efficiency germanium detector array in coincidence with the ^{4}He(K^{-},π^{-})_{Λ}^{4}He reaction at J-PARC. In comparison to the corresponding energy spacing in the mirror hypernucleus _{Λ}^{4}H, the present result clearly indicates the existence of charge symmetry breaking (CSB) in ΛN interaction. By combining the energy spacings with the known ground-state binding energies, it is also found that the CSB effect is large in the 0^{+} ground state but is vanishingly small in the 1^{+} excited state, demonstrating that the ΛN CSB interaction has spin dependence.
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Affiliation(s)
- T O Yamamoto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - M Agnello
- Dipartimento di Scienza Applicate e Tecnologica, Politecnico di Torino, Corso Duca degli Abruzzi, 10129 Torino, Italy
- INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy
| | - Y Akazawa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - N Amano
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - K Aoki
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - E Botta
- INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy
- Dipartimento di Fisica, Universit di Torino, Via P. Giuria 1, 10125 Torino, Italy
| | - N Chiga
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - H Ekawa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - P Evtoukhovitch
- Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
| | - A Feliciello
- INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy
| | - M Fujita
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - T Gogami
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - S Hasegawa
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S H Hayakawa
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - T Hayakawa
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - R Honda
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - K Hosomi
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S H Hwang
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - N Ichige
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Y Ichikawa
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - M Ikeda
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Imai
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Ishimoto
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Kanatsuki
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - M H Kim
- Departiment of Physics, Korea University, Seoul 136-713, Korea
| | - S H Kim
- Departiment of Physics, Korea University, Seoul 136-713, Korea
| | - S Kinbara
- Faculty of Education, Gifu University, Gifu 501-1193, Japan
| | - T Koike
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - J Y Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - S Marcello
- INFN, Sezione di Torino, via P. Giuria 1, 10125 Torino, Italy
- Dipartimento di Fisica, Universit di Torino, Via P. Giuria 1, 10125 Torino, Italy
| | - K Miwa
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - T Moon
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - T Nagae
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - S Nagao
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Y Nakada
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - M Nakagawa
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - Y Ogura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Sakaguchi
- Department of Physics, Osaka University, Toyonaka 560-0043, Japan
| | - H Sako
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Y Sasaki
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Sato
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - T Shiozaki
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Shirotori
- Research Center of Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan
| | - H Sugimura
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - S Suto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Suzuki
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - T Takahashi
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - H Tamura
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Tanabe
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - K Tanida
- Advanced Science Research Center (ASRC), Japan Atomic Agency (JAEA), Tokai, Ibaraki 319-1195, Japan
| | - Z Tsamalaidze
- Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
| | - M Ukai
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - Y Yamamoto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S B Yang
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
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Wirth R, Gazda D, Navrátil P, Calci A, Langhammer J, Roth R. Ab initio description of p-shell hypernuclei. PHYSICAL REVIEW LETTERS 2014; 113:192502. [PMID: 25415901 DOI: 10.1103/physrevlett.113.192502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 06/04/2023]
Abstract
We present the first ab initio calculations for p-shell single-Λ hypernuclei. For the solution of the many-baryon problem, we develop two variants of the no-core shell model with explicit Λ and Σ(+),Σ(0),Σ(-) hyperons including Λ-Σ conversion, optionally supplemented by a similarity renormalization group transformation to accelerate model-space convergence. In addition to state-of-the-art chiral two- and three-nucleon interactions, we use leading-order chiral hyperon-nucleon interactions and a recent meson-exchange hyperon-nucleon interaction. We validate the approach for s-shell hypernuclei and apply it to p-shell hypernuclei, in particular to (Λ)(7)Li, (Λ)(9)Be, and (Λ)(13)C. We show that the chiral hyperon-nucleon interactions provide ground-state and excitation energies that generally agree with experiment within the cutoff dependence. At the same time we demonstrate that hypernuclear spectroscopy provides tight constraints on the hyperon-nucleon interactions.
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Affiliation(s)
- Roland Wirth
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany
| | - Daniel Gazda
- ECT*, Villa Tambosi, 38123 Villazzano, Trento, Italy and Nuclear Physics Institute, 25068 Řež, Czech Republic
| | - Petr Navrátil
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Angelo Calci
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany
| | - Joachim Langhammer
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany
| | - Robert Roth
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany
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