Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 56: Flavour Physics 4

T 56.2: Talk

Wednesday, March 23, 2022, 16:30–16:45, T-H15

Testing the Standard Model with CP-asymmetries in flavour-specific non-leptonic decays — Tim Gershon¹, Alexander Lenz², •Aleksey Rusov², and Nicola Skidmore³ — ¹Department of Physics, University of Warwick, Coventry, CV4 7AL, UK — ²Center for Particle Physics Siegen, Theoretische Teilchenphysik, Universität Siegen, Walter-Flex-Str. 3, 57068 Siegen, Germany — ³University of Manchester, Schuster Building, Manchester, M13 9PL, UK

Motivated by recent indications that the rates of colour-allowed non-leptonic channels are not in agreement with their Standard Model expectations based on QCD factorisation, we investigate the potential to study CP asymmetries with these decays. In the Standard Model, these flavour-specific decays are sensitive to CP violation in B_(s)⁰–B_(s)⁰ mixing, which is predicted with low uncertainties and can be measured precisely with semileptonic decays. If there are beyond Standard Model contributions to the non-leptonic decay amplitudes, there could be significant enhancements to the CP asymmetries. Measurements of these quantities therefore have potential to identify BSM effects without relying on Standard Model predictions that might be affected by hadronic effects. We discuss the experimental prospects, and note the excellent potential for a precise determination of the CP asymmetry in B_s → D_s⁺ π⁻ decays by the LHCb experiment.