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 asymmetries with these decays. In the Standard Model, these flavor-specific decays are sensitive to violation in 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 asymmetries in a model-independent way. We find that BSM contributions could lead to significant enhancements to the asymmetries. Therefore measurements of these quantities and subsequent comparison with the 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 asymmetry in 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