Study of B_{c}\to J/\psi K decays in the perturbative QCD approach

TL;DR

This paper calculates the branching ratio of the B_c to J/psi K decay using perturbative QCD, predicting a measurable rate at LHC-b experiments.

Contribution

First calculation of B_c to J/psi K decay branching ratio within the perturbative QCD framework based on k_T factorization.

Findings

Branching ratio estimated at (1-3)×10^{-4}.

Decay occurs via tree level diagrams in the Standard Model.

Potential for experimental measurement at LHC-b.

Abstract

In this note, we calculate the branching ratio of B_c\to J/\psi K in the framework of perturbative QCD approach based on k_T factorization. This decay can occur only via tree level diagrams in the Standard Model. We find that the branching ratio of B_c\to J/\psi K is about (1-3)\times10^{-4}. The large branching ratio and the clear signals of the final states make the measurement of B_c\to J/\psi K easily at LHC-b experiments.