Anomalies in Hadronic $B \to VV$ Decays
Bhubanjyoti Bhattacharya Marianne Bouchard Alexandre Jean David London Ipsita Ray
作者信息
Abstract
Recently, a fit of charmless $B\to PP$ decays ($B \in \{B^0, B^+, B_s^0\}$, $P \in \{ Ï, K, η, η' \}$) to the latest data was performed under the assumption of flavour SU(3) symmetry [SU(3)$_F$]. It was found that there is a $4.1Ï$ disagreement with the SU(3)$_F$ limit of the Standard Model [$\rm SM_{SU(3)_F}$]. In this paper, we extend this analysis to charmless $B \to VV$ decays ($V \in \{Ï, K^*, Ï, Ï\}$). The fit examining $B \to ÏK^*$ decays, assuming only isospin symmetry, is found to be acceptable. When we fit to $B \to VV$ decays with $V \in \{ Ï, K^* \}$ within SU(3)$_F$, we find a $5.2Ï$ discrepancy with SM$_{SU(3)_F}$. Finally, when $B \to VV$ decays with $V \in \{ Ï, K^*, Ï, Ï\}$ are considered, the discrepancy grows to $>7Ï$. The theoretical input in this analysis is modest, so our results are quite rigorous, group theoretically, and hold almost exactly in the SU(3)$_F$ limit. Although it seems unlikely that the introduction of $\sim 30$% SU(3)$_F$-breaking effects can account for this discrepancy, this must be verified.引用本文复制引用
Bhubanjyoti Bhattacharya,Marianne Bouchard,Alexandre Jean,David London,Ipsita Ray.Anomalies in Hadronic $B \to VV$ Decays[EB/OL].(2026-07-29)[2026-08-01].https://arxiv.org/abs/2607.27202.学科分类
物理学
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