Lambda_b -> Lambda l+ l- decay within family non-universal Z' model

TL;DR

This paper analyzes the rare Lambda_b -> Lambda l+ l- decay within a family non-universal Z' model, showing significant deviations from the Standard Model predictions that can be tested at LHC-b.

Contribution

It provides a comprehensive analysis of the decay in the non-universal Z' model, highlighting shifts in asymmetry zero positions compared to the Standard Model.

Findings

Z' contributes significantly to decay width

Zero positions of asymmetries are shifted left

Results are testable at LHC-b

Abstract

We perform a comprehensive analysis of the rare "Lambda_b -> Lambda l+ l-" decay in the framework of family non-universal Z' model. It is shown that Z' gives considerable contribution to the decay width. Zero positions of the forward-backward asymmetry and alpha_theta parameter are shifted to the left compared to the Standard Model result. The obtained results could be tested in near future at LHC-b.