Abstract
The Standard Model (SM) predicts that , the difference between the direct asymmetries for the modes and that are related by a weak isospin, should be close to zero. There has been a recent claim by the LHCb Collaboration that the measured value of shows an uncomfortable tension with the SM prediction, almost at the level. Motivated by this claim, we critically reexamine the data on all the modes, including the asymmetries and -averaged branching fractions. From a combined Bayesian analysis with the topological amplitudes and their phases as the free parameters, we find that the best-fit region has a large overlap with the parameter space favored in the SM, albeit with some enhancement for the electroweak penguin and the color-suppressed tree amplitudes; consistent with the findings of earlier studies. We find that in this SM-like region, is more than away from zero and the tension with the global average, as well as the LHCb result, is within . Thus, we conclude that there is not yet enough motivation to go beyond the SM.
- Received 5 July 2021
- Revised 23 September 2021
- Accepted 1 November 2021
DOI:https://doi.org/10.1103/PhysRevD.104.095025
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