Fourth-generation SM imprints in B -> K^*l^+l^- decays with polarized K^*

TL;DR

This paper investigates how fourth-generation quarks could influence B -> K^*l^+l^- decays, especially with polarized K^*, and suggests these observables could reveal new physics beyond the Standard Model at LHC.

Contribution

It introduces the impact of fourth-generation quarks on polarized B -> K^*l^+l^- decay observables, highlighting their sensitivity to new physics parameters.

Findings

Polarized branching ratios are sensitive to NP parameters.

Helicity fractions vary with fourth-generation effects.

Tauon final states show significant NP sensitivity.

Abstract

The implication of the fourth-generation quarks in the B -> K^*l^+l^- (l=mu,tau) decays, when K^* meson is longitudinally or transversely polarized, is presented. In this context, the dependence of the branching ratio with polarized K^* and the helicity fractions (f_{L,T}) of K^* meson are studied. It is observed that the polarized branching ratios as well as helicity fractions are sensitive to the NP parameters, especially when the final state leptons are tauons. Hence the measurements of these observables at LHC can serve as a good tool to investigate the indirect searches of new physics beyond the Standard Model.