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Mathur N, Padmanath M, Chakraborty D. Strongly Bound Dibaryon with Maximal Beauty Flavor from Lattice QCD. PHYSICAL REVIEW LETTERS 2023; 130:111901. [PMID: 37001101 DOI: 10.1103/physrevlett.130.111901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 01/09/2023] [Accepted: 02/16/2023] [Indexed: 06/19/2023]
Abstract
We report the first lattice QCD study of the heavy dibaryons in which all six quarks have the bottom (beauty) flavor. Performing a state-of-the-art lattice QCD calculation we find clear evidence for a deeply bound Ω_{bbb}-Ω_{bbb} dibaryon in the ^{1}S_{0} channel, as a pole singularity in the S-wave Ω_{bbb}-Ω_{bbb} scattering amplitude with a binding energy -81( _{-16}^{+14}) MeV. With such a deep binding, Coulomb repulsion serves only as a perturbation on the ground state wave function of the parametrized strong potential and may shift the strong binding only by a few percent. Considering the scalar channel to be the most bound for single flavored dibaryons, we conclude this state is the heaviest possible most deeply bound dibaryon in the visible universe.
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Affiliation(s)
- Nilmani Mathur
- Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - M Padmanath
- Helmholtz Institut Mainz, Staudingerweg 18, 55128 Mainz, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany
| | - Debsubhra Chakraborty
- Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
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Prelovsek S. QCD confronts heavy-flavor and exotic hadrons. EPJ WEB OF CONFERENCES 2022. [DOI: 10.1051/epjconf/202227401014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A review of QCD-based theory approaches to study the heavy-flavor and exotic hadrons is given. The focus is on the results from lattice QCD and from lattice QCD complemented by effective field theories. Both approaches are first briefly introduced and applied in few examples. Then the status of various hadrons sectors is presented.
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Lyu Y, Tong H, Sugiura T, Aoki S, Doi T, Hatsuda T, Meng J, Miyamoto T. Dibaryon with Highest Charm Number near Unitarity from Lattice QCD. PHYSICAL REVIEW LETTERS 2021; 127:072003. [PMID: 34459647 DOI: 10.1103/physrevlett.127.072003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/30/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
A pair of triply charmed baryons, Ω_{ccc}Ω_{ccc}, is studied as an ideal dibaryon system by (2+1)-flavor lattice QCD with nearly physical light-quark masses and the relativistic heavy-quark action with the physical charm quark mass. The spatial baryon-baryon correlation is related to their scattering parameters on the basis of the HAL QCD method. The Ω_{ccc}Ω_{ccc} in the ^{1}S_{0} channel, taking into account the Coulomb repulsion with the charge form factor of Ω_{ccc}, leads to the scattering length a_{0}^{C}≃-19 fm and the effective range r_{eff}^{C}≃0.45 fm. The ratio r_{eff}^{C}/a_{0}^{C}≃-0.024, whose magnitude is considerably smaller than that of the dineutron (-0.149), indicates that Ω_{ccc}Ω_{ccc} is located in the unitary regime.
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Affiliation(s)
- Yan Lyu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Quantum Hadron Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan
| | - Hui Tong
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, Wako 351-0198, Japan
| | - Takuya Sugiura
- Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, Wako 351-0198, Japan
| | - Sinya Aoki
- Quantum Hadron Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan
- Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Takumi Doi
- Quantum Hadron Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan
- Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, Wako 351-0198, Japan
| | - Tetsuo Hatsuda
- Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN, Wako 351-0198, Japan
| | - Jie Meng
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Takaya Miyamoto
- Quantum Hadron Physics Laboratory, RIKEN Nishina Center, Wako 351-0198, Japan
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Wang ZG. Triply-charmed dibaryon states or two-baryon scattering states from QCD sum rules. Int J Clin Exp Med 2020. [DOI: 10.1103/physrevd.102.034008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Richard JM, Valcarce A, Vijande J. Very Heavy Flavored Dibaryons. PHYSICAL REVIEW LETTERS 2020; 124:212001. [PMID: 32530666 DOI: 10.1103/physrevlett.124.212001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
We explore the possibility of very heavy dibaryons with three charm quarks and three beauty quarks, bbbccc, using a constituent model which should lead to the correct solution in the limit of hadrons made of heavy quarks. The six-body problem is treated rigorously, in particular taking into account the orbital, color, and spin mixed-symmetry components of the wave function. Unlike a recent claim based on lattice QCD, no bound state is found below the lowest dissociation threshold.
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Affiliation(s)
- Jean-Marc Richard
- Université de Lyon, Institut de Physique des 2 Infinis de Lyon, IN2P3-CNRS-UCBL, 4 rue Enrico Fermi, 69622 Villeurbanne, France
| | - Alfredo Valcarce
- Departamento de Física Fundamental, Universidad de Salamanca, 37008 Salamanca, Spain
| | - Javier Vijande
- Unidad Mixta de Investigación en Radiofísica e Instrumentación Nuclear en Medicina (IRIMED), Instituto de Investigación Sanitaria La Fe (IIS-La Fe)-Universitat de Valencia (UV) and IFIC (UV-CSIC), 46100 Valencia, Spain
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