Report number
| arXiv:1907.05322 |
Title
| Five-flavor pentaquarks and other light- and heavy-flavor symmetry partners of the LHCb hidden-charm pentaquarks |
Related title | Five-flavor pentaquarks and other light- and heavy-flavor symmetry partners of the LHCb hidden-charm pentaquarks
|
Author(s)
| Peng, Fang-Zheng (Beihang U.) ; Liu, Ming-Zhu (Beihang U.) ; Pan, Ya-Wen (Beihang U.) ; Sánchez Sánchez, Mario (CENBG, Gradignan) ; Pavon Valderrama, Manuel (Beihang U.) |
Publication
| 2022-10 |
Imprint
| 2019-07-11 |
Number of pages
| 21 |
Note
| 13 pages, 4 tables, corresponds to published version |
In:
| Nucl. Phys. B 983 (2022) 115936 |
DOI
| 10.1016/j.nuclphysb.2022.115936
|
Subject category
| nucl-th ; Nuclear Physics - Theory ; hep-lat ; Particle Physics - Lattice ; hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology |
Accelerator/Facility, Experiment
| CERN LHC ; LHCb |
Abstract
| The discovery of three pentaquark peaks -- the Pc(4312), Pc(4440) and Pc(4457)-- by the LHCb collaboration has a series of interesting consequences for hadron spectroscopy. If these hidden-charm objects are indeed hadronic molecules, as suspected, they will be constrained by heavy-flavor and SU(3)-flavor symmetries. The combination of these two symmetries will imply the existence of a series of five-flavor pentaquarks with quark content ˉbcsdu and bˉcsdu, that is, pentaquarks that contain each of the five quark flavors that hadronize. In addition, from SU(3)-flavor symmetry alone we expect the existence of light-flavor partners of the three Pc pentaquarks with strangeness S=−1 and S=−2. The resulting structure for the molecular pentaquarks is analogous to the light-baryon octet -- we can label the pentaquarks as PNQ′ˉQ, PΛQ′ˉQ, PΣQ′ˉQ, PΞQ′ˉQ depending on their heavy- and light-quark content (with N, Λ, Σ, Ξ the member of the light-baryon octet to which the light-quark structure resembles and Q′, ˉQ the heavy quark-antiquark pair). In total we predict 45 new pentaquarks from heavy- and light-flavor symmetries alone, which extend up to 109 undiscovered states if we also consider heavy-quark spin symmetry. If an isoquartet (I=3/2) hidden-charm pentaquark is ever observed, this will in turn imply a second multiplet structure resembling the light-baryon decuplet: PΔQ′ˉQ, PΣ∗Q′ˉQ, PΞ∗Q′ˉQ, PΩQ′ˉQ. |
Copyright/License
| preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2022-2025 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³ |