Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Poster Session
New physics sensitivity in $\Lambda_b\to \Lambda^{(*)}\mu^{+}\mu^{-}$ and $\Lambda_b\to \Lambda^{(*)}\nu\bar{\nu}$ baryonic decays
N. Das* and R. Dutta
Full text: pdf
Pre-published on: November 21, 2022
Published on:
Abstract
The flavor changing neutral b decays with di-leptons and di-neutrinos in the final state provide a great platform to explore physics beyond the standard model (SM). The recent measurements predicted by LHCb on $R_K$, $R_{K_S}$, $R_{K*+}$, $\mathcal{B}(B_s\to \phi \mu^{+}\mu^{-})$ and $\mathcal{B}(B_s\to \mu^{+}\mu^{-})$ proceeding via $b \to s \ell^{+}\ell^{-}$ quark level transitions show a significant deviation from the standard model expectations.
Very recently, Belle II collaboration reported a more precise upper bound of the branching fraction of $\mathcal{B}(B\to K^+\nu\bar{\nu}) < 4.1\times 10^{-5}$ by employing a new inclusive tagging approach.
The $b\to s \ell^{+}\ell^{-}$ and $b\to s\nu\bar{\nu}$ decay channels are related in the SM as well as in beyond the SM physics. In the beyond SM physics, they are
related via $SU(2)_L$ gauge symmetry and can be studied simultaneously in a model independent standard model effective field theory (SMEFT) approach. Moreover, $b\to s\nu\bar{\nu}$ decay channels are theoretically cleaner than the corresponding $b \to s \ell^{+}\ell^{-}$ decays due to the absence of non factorizable corrections and photonic penguin contributions. In this context, we perform a combined analysis of $\Lambda_b\to \Lambda^{(*)}\mu^{+}\mu^{-}$ and $\Lambda_b\to \Lambda^{(*)} \nu\bar{\nu}$ decay modes and study the implication of $b \to s \ell^{+}\ell^{-}$ anomalies in a model independent SMEFT approach. We give predictions of several physical observables within SM and within several new physics scenarios.
DOI: https://doi.org/10.22323/1.414.1000
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.