Analysis of the radiative $\Lambda_b\rightarrow \Lambda \gamma$ transition in SM and scenarios with one or two universal extra dimensions

TL;DR

This paper analyzes the radiative decay of Lambda_b to Lambda gamma within the Standard Model and models with universal extra dimensions, calculating decay widths and branching ratios to identify deviations caused by extra dimensions.

Contribution

It provides a comparative analysis of the Lambda_b to Lambda gamma decay in the Standard Model and extra dimensional scenarios using form factors from light cone QCD.

Findings

Decay widths and branching ratios are computed for different models.

Deviations from the Standard Model predictions are identified at various compactification scales.

Results suggest potential signals of extra dimensions in radiative baryon decays.

Abstract

We investigate the radiative process of the $\Lambda_b\rightarrow \Lambda \gamma$ in the standard model as well as models with one or two compact universal extra dimensions. Using the form factors entered to the low energy matrix elements, calculated via light cone QCD in full theory, we calculate the total decay width and branching ratio of this decay channel. We compare the results of the extra dimensional models with those of the standard model on the considered physical quantities and look for the deviations of the results from the standard model predictions at different values of the compactification scale (1/R).