Constraint on compactification scale via recently observed baryonic $\Lambda_b\rightarrow \Lambda \ell^+ \ell^-$ channel and analysis of the $\Sigma_b \rightarrow \Sigma \ell^+ \ell^-$ transition in SM and UED scenario

TL;DR

This paper constrains the compactification scale of extra dimensions using recent baryonic decay measurements and analyzes the $Sigma ightarrow Sigma \, ext{decay}$ in the UED model, calculating various observables.

Contribution

It provides new bounds on the compactification scale and offers detailed analysis of baryonic decay processes within the UED framework using updated form factors.

Findings

Lower limit on the compactification scale from $Lambda_b ightarrow Lambda \, ext{decay}$ data.

Predictions for branching ratios and asymmetries in $Sigma_b ightarrow Sigma \, ext{decay}$ in UED.

Comparison of UED and SM results for baryonic decay observables.

Abstract

We obtain a lower limit on the compactification scale of extra dimension via comparison of the branching ratio in the baryonic $\Lambda_b\rightarrow \Lambda \mu^+ \mu^-$ decay channel recently measured by CDF collaboration and our previous theoretical study. We also use the newly available form factors calculated via light cone QCD sum rules in full theory to analyze the flavour changing neutral current process of the $\Sigma_b \rightarrow \Sigma \ell^+ \ell^-$ in universal extra dimension scenario in the presence of a single extra compact dimension. We calculate various physical quantities like branching ratio, forward-backward asymmetry, baryon polarizations and double lepton polarization asymmetries defining the decay channel under consideration. We also compare the obtained predictions with those of the standard model.