Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 32: Flavour physics VI
T 32.10: Vortrag
Dienstag, 16. März 2021, 18:15–18:30, Tg
Search for the lepton flavour violating decays
B0 → K*(892)0 µ±e∓ and Bs0→ φ(1020) µ±e∓
— •Jan-Marc Basels, Andreas Güth, Christoph Langenbruch, and Stefan Schael for the LHCb collaboration — I. Physikalisches Institut B, RWTH Aachen University, Aachen, Germany
The conservation of lepton flavour in interactions involving charged leptons is a central property of the Standard Model (SM). Thus, every discovery of lepton flavour violation (LFV) would simultaneously be a discovery of new physics.
Designed to study the decays of heavy flavour hadrons, the LHCb detector at the Large Hadron Collider (LHC) at CERN allows for the search for LFV in b → sℓ+ℓ′− transitions of B-mesons with unprecedented sensitivity. An additional motivation for such searches arises by recent tests of lepton flavour universality (LFU) in rare b → sℓ+ℓ− decays, which have shown tensions with the SM prediction. Any discovery of lepton flavour non-universality would generally imply the existence of LFV.
This talk presents the status of a search for the LFV decays B0 → K*(892)0 µ±e∓ and Bs0→ φ(1020) µ±e∓, based on a dataset taken with the LHCb detector during Run 1 and Run 2 of the LHC that corresponds to an integrated luminosity of 9.1 fb−1. Particular focus is placed on the study and control of backgrounds and the determination of expected upper limits on the signal branching fraction.