Double-Lepton Polarization Asymmetries and Branching Ratio in $B \rar K_{0}^{*}(1430) l^+ l^- $ transition from Universal Extra Dimension Model

TL;DR

This paper examines how the Universal Extra Dimension model affects the $B o K_0^*(1430) l^+ l^-$ decay, focusing on polarization asymmetries and branching ratios, revealing significant differences from the Standard Model at small compactification radii.

Contribution

It introduces calculations of polarization asymmetries and branching ratios in the UED model for this decay, highlighting deviations from the Standard Model predictions.

Findings

Significant discrepancies between UED and SM at low 1/R values.

Double lepton polarization asymmetries are sensitive to the extra dimension.

Branching ratios vary notably with the compactification radius R.

Abstract

We investigate the $B \rar K_{0}^{*}(1430) l^+ l^- $ transition in the Applequist-Cheng-Dobrescu model in the presence of a universal extra dimension. In particular, we calculate double lepton polarization asymmetries and branching ratio related to this channel and compare the obtained results with the predictions of the standard model. Our analysis of the considered observables in terms of radius $R$ of the compactified extra-dimension as the new parameter of the model show a considerable discrepancy between the predictions of two models in low $\frac{1}{R}$ values.