Weak radiative decays of hyperons and charmed baryons in a quark model

Abstract

The weak radiative decays of 1/2+ baryons are studied in a quark model as arising through single-quark spectator and nonspectator quark transitions. These decays seem to occur predominantly through nonspectator processes, where the quarks may interact through the exchange of colored gauge bosons. We compare the decay-amplitude sum rules in left Xleft and left Xright current-current interaction pictures.

Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model

“…These results in the baryon decays clearly provide great opportunities to test the SM. On the theoretical side, the radiative bottom decays of B b → B n γ with B n the the low-lying octet baryons have been studied with many approaches, such as the heavy quark effective theory [20], perturbative QCD [21], SU(3) F flavor symmetry [22], light-cone sum rule (LCSR) [23,24], Bethe-Salpeter equation (BSE) [25], quark model (QM) [26][27][28][29], and effective Lagrangian [30]. In this paper, we adopt the light front quark model (LFQM), where the quark spins and the center-of-mass motions of hadrons can be treated in a consistent and fully relativistic manner, as the wave functions of the baryons are manifestly boost invariant.…”