Speaker
Alexander Parkhomenko
(P.G.DEmidov Yaroslavl State University)
Description
Recently the LHCb Collaboration reported about the observation of four excited states $\Omega_b (6316)$, $\Omega_b (6330)$, $\Omega_b (6340)$, and $\Omega_b (6350)$ in the $\Xi_b^0 K^-$ invariant mass spectrum. Possible spin-parity assignments of these resonances in the Quark-Diquark Model as $P$-wave baryons is discussed and a comparison with theoretical predictions based on the heavy-quark symmetry is given. Parameters of the effective Hamiltonian used for mass estimations are determined from the observed spectrum of $\Omega_b^-$-baryons.
Primary author
Alexander Parkhomenko
(P.G.DEmidov Yaroslavl State University)
