SMuK 2023 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 55: Flavor V, Top-BSM

T 55.1: Vortrag

Mittwoch, 22. März 2023, 15:50–16:05, HSZ/0401

Measurement of the isospin asymmetry in B→ K^*µ⁺µ⁻ decays with LHCb — Christoph Langenbruch, •Thomas Oeser, and Stefan Schael — I. Physikalisches Institut B, RWTH Aachen

In the Standard Model (SM), b→ sℓ⁺ℓ⁻ transitions are forbidden at tree level and can only occur via loop-level and higher-order processes. Precision measurements of these processes therefore constitute powerful tests of the SM, sensitive to various potential New Physics contributions.

The isospin asymmetry A_I between B⁰→ K^*0µ⁺µ⁻ and B⁺→ K^*+µ⁺µ⁻ has a clean SM prediction as many hadronic uncertainties cancel in the calculation. Previous measurements are consistent with SM expectations, within still large uncertainties.

This talk presents an overview of the analysis of the isospin asymmetry in B→ K^*µ⁺µ⁻ using the full LHCb dataset, recorded between 2011 and 2018 and corresponding to an integrated luminosity of approximately 9fb⁻¹.