Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 88: Flavorphysik III

T 88.5: Vortrag

Donnerstag, 28. März 2019, 17:05–17:20, S15

Search for the Lepton Flavour Violating decay Bs0→ φ e±µ — •Jan-Marc Basels, Andreas Güth, Christoph Langenbruch, and Stefan Schael — I. Physikalisches Institut B, RWTH Aachen University, Germany

In the Standard Model (SM) of particle physics the coupling of gauge bosons to leptons is independent of their flavour, which is known as lepton flavour universality. Thus, the branching fraction ratios Rh of rare semileptonic B decays, defined as Rh = B(Bh µ+ µ )/B(Bh e+ e), are precisely predicted to be unity in the SM. The most precise measurements of the Rh ratios so far are performed by the LHCb experiment showing deviations of up to 2.6 standard deviations (σ) from the SM prediction. Lepton flavour non-universality would generally imply lepton flavour violation, which could be explained by several theories beyond the SM.
This talk will present the analysis strategy of a search for the lepton flavour violating decay Bs0→ φ e±µ with particular focus on the study and control of backgrounds.

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