Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Flavor Physik I

T 39.8: Vortrag

Dienstag, 20. März 2018, 18:20–18:35, Z6 - SR 2.006

Angular analysis of B_s⁰→ φµ⁺µ⁻ decays — •Marcel Materok, Christoph Langenbruch, and Eluned Smith — RWTH Aachen

The LHCb experiment at the LHC is dedicated to the search for new phenomena beyond the Standard Model (SM) through precision measurements of heavy flavour decays. Rare semileptonic b→ sµ⁺µ⁻ decays are particularly interesting as they constitute flavor changing neutral currents that are forbidden at tree-level in the SM and are only allowed at loop level. New heavy particles beyond the SM can thus give significant contributions and affect branching fractions and angular observables.

The rare decay B_s⁰→ φµ⁺µ⁻ has been previously analysed by the LHCb collaboration using data taken in 2011 and 2012, during Run 1 of the LHC. In this analysis, both the branching fraction and the angular observables have been determined and a deviation corresponding to around 3σ from SM predictions were found for the branching fraction.

This talk will give an overview of the analysis strategy to measure the angular observables in the B_s⁰→ φµ⁺µ⁻ decay using the combined Run 1 and 2 LHCb Data. The current status of the analysis will also be presented.