Strong and radiative decays of the low-lying S - and P -wave singly heavy baryons

Abstract

The strong and radiative decays of the low-lying S -and P-wave Λ c(b) − of the 6 F multiplet have similar strong decay properties. In order to identify them, angular distributions of their decays in either strong decay modes or radiative transitions should be needed.,

Analysis of Λc(2595) , Λc(2625)Kawakami1, Harada2 2018Phys. Rev. D282300View full textAdd to dashboardCite

“…The properties of these states have been studied experimentally and theoretically (see, e.g., Refs. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] and references therein). In the present analysis, we compare our predictions of the decay widths with other available predictions by quark models [12,13] and chiral effective models [14,15].…”

Possible interpretation of the newly observed Ω(2012) state

“…In present work we will attempt to understand the inner structure of this newly observed state Ωð2012Þ by analyzing the strong decay properties of its possible candidates within a chiral quark model, so that our theoretical widths can be compared with the measured width directly. The chiral quark model [24] is developed and successfully used to study the Okubo-Zweig-Iizuka (OZI) allowed two-body strong decays of the heavy-light mesons [25][26][27][28] and baryons [29][30][31][32][33][34][35][36]. In this framework, the spatial wave functions of heavy baryons are described by harmonic oscillators, and an effective chiral Lagrangian is then introduced to account for the quark-meson coupling at the baryon-meson interaction vertex.…”

Observation of a New Ξb− Resonance

“…Three such isodoublets, which are neither radially nor orbitally excited, should exist [4], and include one with spin j qs ¼ 0 and J P ¼ ð1=2Þ þ (Ξ b ), a second with j qs ¼ 1 and [5][6][7]. Beyond these lowest-lying states, a spectrum of heavier states is expected [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], where there are either radial or orbital excitations amongst the constituent quarks. The only such states discovered thus far in the b-baryon sector are the Λ b ð5912Þ 0 and Λ b ð5920Þ 0 resonances [24], which are consistent with being orbital excitations of the Λ 0 b baryon.…”