Alberti, Maurizio and Bali, Gunnar S. and Collins, Sara and Knechtli, Francesco and Moir, Graham and Soeldner, Wolfgang (2017) Hadroquarkonium from lattice QCD. PHYSICAL REVIEW D, 95 (7): 074501. ISSN 2470-0010, 2470-0029
Full text not available from this repository.Abstract
The hadroquarkonium picture [S. Dubynskiy and M.B. Voloshin, Phys. Lett. B 666, 344 (2008)] provides one possible interpretation for the pentaquark candidates with hidden charm, recently reported by the LHCb Collaboration, as well as for some of the charmoniumlike "X, Y, Z" states. In this picture, a heavy quarkonium core resides within a light hadron giving rise to four-or five-quark/antiquark bound states. We test this scenario in the heavy quark limit by investigating the modification of the potential between a static quark-antiquark pair induced by the presence of a hadron. Our lattice QCD simulations are performed on a Coordinated Lattice Simulations (CLS) ensemble with N-f = 2-1 flavors of nonperturbatively improved Wilson quarks at a pion mass of about 223 MeV and a lattice spacing of about a = 0.0854 fm. We study the static potential in the presence of a variety of light mesons as well as of octet and decuplet baryons. In all these cases, the resulting configurations are favored energetically. The associated binding energies between the quarkonium in the heavy quark limit and the light hadron are found to be smaller than a few MeV, similar in strength to deuterium binding. It needs to be seen if the small attraction survives in the infinite volume limit and supports bound states or resonances.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUCLEAR-BOUND QUARKONIUM; HEAVY QUARKONIUM; TRIANGLE SINGULARITIES; DOMAIN DECOMPOSITION; MULTIQUARK HADRONS; FIELD-THEORIES; CHARMONIUM; STATES; MESONS; FORCES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Gunnar Bali |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:11 |
| Last Modified: | 28 Feb 2019 08:56 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1052 |
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