Speaker
Description
We make a correlative study of B-meson anomalies and fermionic dark matter in an extended standard model framework with $U(1)_{L_e-L_\mu}$ gauge symmetry. With three heavy neutral fermions and scalar double leptoquark $\tilde{R}_2$, we realize the $b\to s$ transition. On top, an additional singlet spontaneously breaks the new $U(1)$ and an inert scalar doublet to obtain neutrino mass at one loop. We then focus on the dark matter relic density and direct detection cross-section in scalar and gauge portals. The new physics contribution for $b \to s$ transition comes from penguin diagrams with $Z^\prime$, leptquark, and new fermions. We then constrain the model parameter space from the dark sector and also the well-established observables such as Br($B_s \to \phi, K^{(*)}) \mu \mu$ and $P_5^{\prime}$ processes. Utilizing the allowed parameter space consistent with both sectors, we discuss the impact on several observables such as branching ratio, forward-backward asymmetry, and polarisation asymmetry. We also explore the lepton non-universality of $\Lambda_b \to \Lambda ^* (1520) (\to pK) \ell \ell$ process.
| Track type | Flavour Physics |
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