Conference on Flavor Physics and CP Violation (FPCP 2019)

Angular analysis of $B_{(s)} \to K_1(\phi) ll$ decay modes

Not scheduled

15m

Bob Wright, B150

Contributed Oral Rare Decays of Hadrons and Leptons

Speaker

Dr Suchismita Sahoo (Physical Research Laboratory)

Description

The LHCb experiment has reported discrepancy of $(2.2-2.4)\sigma$ in the $\mu/e$ ratio of $\bar B \to \bar K^* l^+ l^-$ process, $R_{K^*}$, which reinforce the hints of lepton nonuniversality observed in $B^+ \to K^+ l^+ l^-$ process. We investigate the analogous lepton non-universaity ratios and other asymmetries in $B \to K_1 l^+ l^-$ and $B_s \to \phi l^+ l^-$ processes both in model dependent and independent approches. We constrain the new parameter space consistent with experimental limit on Br($B_s \to ll$), Br($\bar B \to X_s ll$), Br($\bar B^0 \to \bar K^0 ll$), Br($\bar B \to K^{(*)} \nu_l \bar \nu_l$), Br($\bar B \to X_s \nu_l \bar \nu_l$), $R_K$ and $R_{K^*}$ parameters. We then show the effects of new parameters on the branching ratios, forward-backward asymmetries, CP violating parameters of $B_{(s)} \to K_1 (\phi) l^+ l^-$ processes. As like $R_{K^{(*)}}$, we also check the existence of the violation of lepton universality in these decay modes. We observe that the analysis of $B$ decays to axial vector mesons can also serve as a good tool to probe physics beyond the SM.