Open AccessSpin-parity assignments of excited Ωb− -baryons in the Quark-Diquark Model
Author(s) -
Ahmed Ali,
Alexandra Dobrynina,
E. Oleinik,
A. Ya. Parkhomenko
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1690/1/012163
Subject(s) - physics , algorithm , baryon , particle physics , computer science
Recently the LHCb Collaboration have found four baryonic states called Ω b (6316), Ω b (6330), Ω b (6340), and Ω b (6350) in the Ξ b 0 K − invariant mass spectrum. Possible spin-parity assignments of these resonances in the Quark-Diquark Model as P -wave baryons are discussed. Parameters of the effective Hamiltonian are determined from the observed spectrum of Ω b − -baryons and compared with the ones extracted from the mass spectrum of Ω c * -baryons. Alternative interpretation, in which the three lowest-mass states have the spin-parities J P = 3/2 − , 3/2 − , 5/2 − , predicts an Ω b − -baryon with the mass M ≃ 6304 MeV which is not yet seen experimentally.