Study of Bs-> \phi l^+ l^-$ Decay in a Single Universal Extra Dimension

Understand

Utilizing form factors calculated within the light-cone sum rules, we have evaluated the decay branching ratios of $B_s\to \phi\gamma$ and $B_s\to \phi \ell^+\ell^-$ in a single universal extra dimension model (UED), which is viewed as one of the alternative theories beyond the standard model (SM).

• For the decay $B_s \to \phi \ell^+\ell^-$, the dilepton invariant mass spectra, the forward-backward asymmetry, and double lepton polarization are also calculated.
• For each case, we compared the obtained results with predictions of the SM.
• In lower values of the compactification factor 1/R, the only parameter in this model, we see the considerable discrepancy between the UED and SM models.