LIU, Ming-Zhu; PENG, Fang-Zheng; SÁNCHEZ SÁNCHEZ, Mario; VALDERRAMA, Manuel Pavon

doi:10.1103/PhysRevD.98.114030

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LIU, Ming-Zhu

PENG, Fang-Zheng

SÁNCHEZ SÁNCHEZ, Mario
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Phys.Rev.D. 2018, vol. 98, n° 11, p. 114030

Résumé en anglais

The spectrum of heavy-hadron molecules is constrained by heavy-quark symmetry in its different manifestations. Heavy-quark spin symmetry for instance connects the properties of the ground and excited states of heavy hadrons, while heavy-antiquark-diquark symmetry connects the properties of heavy antimesons (D¯, D¯*) and doubly heavy baryons (Ξcc, Ξcc*). A prediction of these symmetries is that if the Pc(4450) is indeed a D¯*Σc bound state, then there should be a series of D¯*Σc*, ΞccΣc, Ξcc*Σc, ΞccΣc* and Ξcc*Σc* partners. The concrete application of heavy-quark spin symmetry indicates that, if the Pc(4450) is a 32- D¯*Σc molecule, the existence of a 52- D¯*Σc* partner with similar binding energy—which we call Pc(4515), given its expected mass—is likely. Conversely, the application of heavy-antiquark-diquark symmetry indicates that the 0+ ΞccΣc, 1+ ΞccΣc*, 2+ Ξcc*Σc and 3+ Ξcc*Σc* molecules are likely to bind too, with binding energies in the 20–30 MeV range.< Réduire

Mots clés en anglais

Strong Interactions

heavy quark: symmetry

spin: symmetry

heavy quark: spin

baryon: heavy

hadron: heavy

quark: spin

binding energy

excited state

bound state

pentaquark

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Heavy-quark symmetry partners of the $P_c(4450)$ pentaquark

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