Model independent determination of the spins of the $P_{c}$(4440) and $P_{c}$(4457) from the spectroscopy of the triply charmed dibaryons
| Autor: | Pan, Ya-Wen, Liu, Ming-Zhu, Peng, Fang-Zheng, Sánchez Sánchez, Mario, Geng, Li-Sheng, Pavon Valderrama, Manuel |
|---|---|
| Přispěvatelé: | Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
splitting
meson baryon: molecule pentaquark: mass FOS: Physical sciences heavy quark: symmetry nonperturbative High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) High Energy Physics - Lattice High Energy Physics - Phenomenology (hep-ph) threshold [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] model: molecule lattice [PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat] strong interaction High Energy Physics - Lattice (hep-lat) lattice field theory 12.39.Mk LHC-B dibaryon High Energy Physics - Phenomenology diquark [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] pentaquark: spin 13.25.Jx antiquark 13.60.Le |
| Zdroj: | Physical Review D Physical Review D, American Physical Society, 2020, 102 (1), pp.011504. ⟨10.1103/PhysRevD.102.011504⟩ |
| ISSN: | 1550-7998 1550-2368 |
| DOI: | 10.1103/PhysRevD.102.011504⟩ |
| Popis: | The LHCb collaboration has recently observed three narrow pentaquark states --- the $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$ ---that are located close to the $\bar{D} \Sigma_c$ and $\bar{D}^* \Sigma_c$ thresholds. Among the so-far proposed theoretical interpretations for these pentaquarks, the molecular hypothesis seems to be the preferred one. Nevertheless, in the molecular picture the spins of the $P_c(4440)$ and $P_c(4457)$ have not been unambiguously determined yet. In this letter we point out that heavy antiquark-diquark symmetry induces a model-independent relation between the spin-splitting in the masses of the $P_c(4440)$ and $P_c(4457)$ $\bar{D}^* \Sigma_c$ pentaquarks and the corresponding splitting for the $0^+$ and $1^+$ $\Xi_{cc} \Sigma_c$ triply charmed dibaryons. This is particularly relevant owing to a recent lattice QCD prediction of the $1^+$ triply charmed dibaryon, which suggests that a calculation of the mass of its $0^+$ partner might be within reach. This in turn would reveal the spins of the $P_c(4440)$ and $P_c(4457)$ pentaquarks, providing a highly nontrivial test of heavy-quark symmetry and the molecular nature of the pentaquarks. Furthermore, the molecular interpretation of the hidden-charm pentaquarks implies the existence of a total of ten triply charmed dibaryons as $\Xi_{cc}^{(*)} \Sigma_c^{(*)}$ molecules, which, if confirmed in the lattice, will largely expand our understanding of the non-perturbative strong interaction in the heavy-quark sector. Comment: 6 pages, 1 figure, 3 tables |
| Databáze: | OpenAIRE |
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