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Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 40: Flavorphysik I

T 40.6: Talk

Tuesday, March 26, 2019, 17:15–17:30, S15

Angular analysis of Bs0 → φ µ+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 bs+ decays are particularly interesting as they constitute flavour-changing neutral currents that are forbidden at tree-level in the SM and are only allowed at loop-level. Theses processes are thus rare and the theoretically clean angular observables are sensitive to the effects of new, heavy particles beyond the SM.

The rare decay Bs0→ φµ+µ has been previously analysed by the LHCb collaboration using data taken in 2011 and 2012, during Run 1 of the LHC. Further studies of this mode are particularly motivated by recent tensions with SM predictions seen in other rare bs+ processes.

This talk will show the progress of the measurement of the angular observables in the Bs0→ φµ+µ decay using Run 1 and 2 LHCb Data. The focus of this talk will be on the validation of the angular fit.

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