26. Deutsche Physikerinnentagung 2022 (German Conference of Women in Physics)

Search for the rare decay Ωb−→Ω−μ−μ+ at the LHCb experiment

Nov 26, 2022, 11:00 AM

15m

Gaede-Hörsaal (KIT Campus South)

Talk Physics talks Physics Talks - Astroparticle and Experimental Particle Physics

Speaker

Janina Nicolini (TU Dortmund University/ Université Paris-Saclay)

Description

Rare decays of heavy-quark hadrons provide a powerful way to probe indirectly for presence of phenomena beyond the Standard Model of particle physics.
At the LHCb experiment several $b\to s\ell \ell$ transitions, such as the rare decays $B\to K\ell \ell$ or $B\to K^{\ast }\ell \ell$, have been studied. They show tensions towards the Standard Model predictions in several observables, such as lepton universality ratios ($R_K$, $R_{K^{\ast }}$) or angular observables. So far most of the measurements have been focused on mesons and the ${\mathrm{\Lambda }}_b$ baryon. To improve the understanding of the anomalies and widen the available knowledge, it is crucial to study $b\to s\ell \ell$ transitions for other weakly decaying baryons as well.

Therefore, the primary aim of the presented analysis is to observe the decay ${\mathrm{\Omega }}_b^{-}\to {\mathrm{\Omega }}^{-}{\mu }^{-}{\mu }^{+}$. If successful, the branching ratio relative to the decay ${\mathrm{\Omega }}_b^{-}\to {\mathrm{\Omega }}^{-}J/\mathrm{\Psi }(\to {\mu }^{-}{\mu }^{+})$ will be measured.

The used data set corresponds to an integrated luminosity of $9{\mathrm{fb}}^{-1}$, which has been collected with the LHCb experiment from 2011 to 2018. In this talk the current status of the analysis is presented.

Presentation materials

PhysikerinnenTagung_JNicolini.pdf