Searching for tetraquark through weak decays of b-baryons

Abstract

This dissertation reviews the use of the helicity formalism for the Λ0 b → Λ0Z0 (3900) decay to calculate the branching ratio of this process. This is an exclusive process and involve the non-perturbative quantity, i.e., the form factors. The calculation of form factors Λb → Λ in helicity amplitude are studied in the full quark model wave function. We described the decay amplitudes for various processes using nonperturbative amplitudes, which parametrized in terms of the SU(3) irreducible representations. By utilizing these results, we derive several relations for the partial decay widths. These calculations allow us to estimate relevant partial decay widths of b−baryons. The outcomes reviwed in this dissertation can be experimentally tested at hadron colliders in the future. After the discovery of the charged and neutral Zc(3900) particles, it is crucial to continue exploring di erent ways to produce these exotic states. In this study, we focus on investigating the potential to observe the Zc(3900) through weak decays of b−baryons at the LHCb experiment.