2025/05/16 by Bhattacharya, Bhubanjyoti, Bouchard, Marianne, Hudy, Luke +3
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2505.11492
Recently, B→ PP decays (B = \B0, B+, Bs0\, P = \ π, K \) were analyzed under the assumption of flavor SU(3) symmetry (SU(3)F). Although the individual fits to ΔS=0 or ΔS=1 decays are good, it was found that the combined fit is very poor: there is a 3.6σ disagreement with the SU(3)F limit of the standard model (SM_\rmSU(3)F). One can remove this discrepancy by adding SU(3)F-breaking effects, but 1000% SU(3)F breaking is required. In this paper, we extend this analysis to include decays in which there is an η and/or η' meson in the final state. We now find that the combined fit exhibits a 4.1σ discrepancy with the SM_\rmSU(3)F, and 1000% SU(3)F-breaking effects are still required to explain the data. These results are rigorous, group-theoretically -- no theoretical assumptions have been made. But when one adds some theoretical input motivated by QCD factorization, the discrepancy with the SM_\rmSU(3)F grows to 4.9σ.