• Open Access

Testing the Standard Model with CP asymmetries in flavor-specific nonleptonic decays

Tim Gershon, Alexander Lenz, Aleksey V. Rusov, and Nicola Skidmore
Phys. Rev. D 105, 115023 – Published 16 June 2022

Abstract

Motivated by recent indications that the rates of color-allowed nonleptonic channels are not in agreement with their Standard Model expectations based on QCD factorization, we investigate the potential to study CP asymmetries with these decays. In the Standard Model, these flavor-specific decays are sensitive to CP violation in B(s)0B¯(s)0 mixing, which is predicted with low uncertainties and can be measured precisely with semileptonic decays. Allowing beyond Standard Model (BSM) contributions to the nonleptonic decay amplitudes, we derive explicit expressions for the flavor-specific CP asymmetries in a model-independent way. We find that BSM contributions could lead to significant enhancements to the CP asymmetries. Therefore measurements of these quantities and subsequent comparison with the CP asymmetries measured with semileptonic decays have potential to identify BSM effects without relying on Standard Model predictions that might be affected by hadronic effects. In addition, we discuss the experimental prospects, and note the excellent potential for a precise determination of the CP asymmetry in B¯sDs+π decays by the LHCb experiment.

  • Received 1 December 2021
  • Accepted 13 May 2022

DOI:https://doi.org/10.1103/PhysRevD.105.115023

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Tim Gershon

  • Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom

Alexander Lenz and Aleksey V. Rusov

  • Physik Department, Universität Siegen, Walter-Flex-Strasse 3, 57068 Siegen, Germany

Nicola Skidmore

  • University of Manchester, Schuster Building, Manchester M13 9PL, United Kingdom

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Issue

Vol. 105, Iss. 11 — 1 June 2022

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