Nuclear and Particle Physics Colloquium   82

(核与粒子物理学术报告会82)

Place: C826, National Laboratory II, Sha-He Campus, Beihang University

Title: Weak decays of heavy baryon in the light front quark model

Speaker: Prof. Hong-Wei Ke

Abstract:

Light-front quark model is a relativistic quark model based on the light-front QCD. The basic ingredient is the hadron light-front wave function which is explicitly Lorentz-invariant. The hadron spin is constructed using the Melosh rotation. The light-front approach has been widely applied to calculate various decay constants and form factors for the meson cases.

We extended the light-front quark model to study the weak decays of Λ_b and Σ_b in the heavy-quark-light-diquark picture of baryon. Our results are consistent with those given in the literature. The application of the extension of the light-front quark model to baryon has achieved a preliminary success. In a recent work, we treat the three quarks as individual ones and possess their own color indices, spin polarizations (or helicities) and momenta. In one word, we make a three-body calculation rather than a two-body one.

Hong-Wei Ke is a Professor of Physics at Tianjin University who studies Theoretical Physics, with a focus on particle physics. He works on the weak decays of baryon, the radiative decay of meson, exotic states and their strong decays, Bethe-Salpeter equation, light-front quark model and the relation between CKM and PMNS.