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Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 32: Flavour physics VI

T 32.4: Talk

Tuesday, March 16, 2021, 16:45–17:00, Tg

Search for the rare decay Ωb → Ωµµ+ at the LHCb experimentJohannes Albrecht, Vitalii Lisovskyi, and •Janina Nicolini — Technische Universität Dortmund

At the LHCb experiment several bsℓℓ transitions, such as BKℓℓ or BK*ℓℓ, have been studied. They show tensions towards the Standard Model predictions in several observables, such as lepton universality ratios (RK, RK*) or angular observables. While the differential branching fractions for mesonic and baryonic decays differ, most of the measurements have been focused on mesons and the Λb baryon. To clarify the nature of the tensions seen for the Λb decays, it is important to study bsℓℓ transitions for other weakly decaying baryons as well.

Therefore the primary aim of this analysis is to observe the decay Ωb → Ωµµ+. If successful, the branching ratio relative to the decay Ωb → Ω J/Ψ(→µµ+) will be measured.

The used data set corresponds to an integrated luminosity of 6 fb−1, which has been taken with the LHCb experiment from 2015 to 2018. In this talk the current status of the analysis is presented.

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