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T: Fachverband Teilchenphysik

T 74: Flavor physics: CKM II

T 74.3: Vortrag

Donnerstag, 2. April 2020, 17:00–17:15, H-HS XI

Angular analysis of B_s⁰ → φ µ⁺µ⁻ decays — •Marcel Materok, Christoph Langenbruch, and Eluned Smith — I. Physikalisches Institut B, RWTH Aachen University

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 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 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. Further studies of this mode are particularly motivated by recent tensions with SM predictions seen in other rare b→ sℓℓ processes.

This talk will show the progress of the measurement of the angular observables in the B_s⁰→ φµ⁺µ⁻ decay using Run 1 and 2 LHCb data samples.