Nefediev, A- (2024) Exotic states of fully heavy hadrons. Il nuovo cimento C, 47 (4). pp. 1-5. ISSN 1826-9885
|
Text
ncc12992.pdf - Published Version Download (199kB) | Preview |
Abstract
QCD supports the existence of hadrons with a structure richer than quark-antiquark mesons and three-quark baryons that are conventionally referred to as exotic. Many candidates for such states have been discovered experimentally in the spectrum of heavy quarks, with their minimal quark content being fourquark: two heavy plus two light quarks. In addition, recent results of the LHCb Collaboration on the double-J/ψ production near the threshold hint at the existence of fully charmed tetraquark states. A coupled-channel analysis of the LHCb data and a possible theoretical interpretation of the near-threshold exotic state predicted by this analysis are discussed. In the hadronic molecule interpretation, the strength of the interaction in the double-J/ψ system mediated by soft-gluon exchanges is proportional to the chromopolarisability of the J/ψ. The same low-energy parameter evaluated for a fully heavy baryon appears several times larger than that for the heavy quarkonium composed of the heavy quarks of the same flavour. Thus a theoretical interpretation of the LHCb observation results in the prediction of a possible existence of di-baryon molecules formed by fully heavy baryons.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Sep 2024 15:32 |
| Last Modified: | 11 Sep 2024 15:32 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23138 |
Actions (login required)
 |
View Item |
