Details

Autor(en) / Beteiligte

• Wang, Wei
• Zhu, Rui-Lin

Titel

Interpretation of the newly observed Ωc0 resonances

Ist Teil von

• Physical review. D, 2017-07, Vol.96 (1)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We study the charmed and bottomed doubly strange baryons within the heavy-quark-light-diquark framework. The two strange quarks are assumed to lie in S wave and thus their total spin is 1. We calculate the mass spectra of the S- and P-wave orbitally excited states and find the Ωc0(2695) and Ωc0(2770) fit well as the S-wave states of charmed doubly strange baryons. The five newly Ωc0(X) resonances observed by the LHCb Collaboration, i.e., Ωc0(3000), Ωc0(3050), Ωc0(3066), Ωc0(3090), and Ωc0(3119), can be interpreted as the P-wave orbitally excited states. In heavy quark effective theory, we analyze their decays into the Ξc+K− and Ξc′+K−, and point out that decays of the five P-wave Ωc0 states into the Ξc+K− and Ξc′+K− are suppressed by either heavy quark symmetry or phase space. The narrowness of the five newly observed Ωc0(X) states can then be naturally interpreted with heavy quark symmetry.