Analysis of the semileptonic $\Lambda_b\rightarrow \Lambda \ell^+ \ell^-$ transition in topcolor-assisted technicolor (TC2) model

TL;DR

This paper compares the $ ext{Lambda}_b o ext{Lambda} ext{l}^+ ext{l}^-$ decay process in the standard model and topcolor-assisted technicolor model, analyzing decay rates, asymmetries, and experimental data to explore new physics effects.

Contribution

It provides a detailed comparison of the decay process predictions between the standard model and topcolor-assisted technicolor model using light cone QCD sum rules.

Findings

Topcolor-assisted technicolor model predicts deviations from the standard model in decay observables.

Results show consistency with recent experimental data from CDF and LHCb.

The study highlights potential signatures of new physics in flavor-changing neutral current decays.

Abstract

We comparatively analyze the flavor changing neutral current process of the $\Lambda_b \rightarrow \Lambda \ell^+ \ell^-$ in the standard model as well as topcolor-assisted technicolor model using the form factors calculated via light cone QCD sum rules in full theory. In particular, we calculate the decay width, branching ratio and lepton forward-backward asymmetry related to this decay channel. We compare the results of the topcolor-assisted technicolor model with those of the standard model and debate how the results of the topcolor-assisted technicolor model depart from the standard model predictions. We also compare our results on the differential branching ratio with recent experimental data provided by CDF and LHCb Collaborations.