Analysis of Various Polarization Asymmetries In The Inclusive $b\to s \ell^+ \ell^-$ Decay In The Fourth-Generation Standard Model

TL;DR

This paper investigates polarization asymmetries in the inclusive $b o s \, ext{leptons}$ decay within a four-generation Standard Model, revealing potential deviations from the Standard Model that could indicate new physics.

Contribution

It provides a systematic analysis of polarization asymmetries in $b o s \, ext{leptons}$ decay considering a fourth quark generation, highlighting their sensitivity to new quark mixing and masses.

Findings

Asymmetries are sensitive to new quark mixing parameters.

Significant deviations from SM predictions are observed.

Decay processes can serve as probes for fourth-generation quarks.

Abstract

In this study a systematical analysis of various polarization asymmetries in inclusive $b \rar s \ell^+ \ell^-$ decay in the standard model (SM) with four generation of quarks is carried out. We found that the various asymmetries are sensitive to the new mixing and quark masses for both of the $\mu$ and $\tau$ channels. Sizeable deviations from the SM values are obtained. Hence, $b \rar s \ell^+ \ell^-$ decay is a valuable tool for searching physics beyond the SM, especially in the indirect searches for the fourth-generation of quarks ($t', b')$.