AI 中文总结
该研究针对强子B衰变，发现味SU(3)对称性假设下的全局拟合与标准模型存在4.1σ偏差，施加理论约束后偏差接近5σ，暗示衰变中存在新物理贡献。
AI 中文摘要
在味SU(3)对称性[SU(3)_F]假设下，已对衰变B→PP（其中赝标量P为π或K）开展研究。全局拟合结果与标准模型（SM）存在3.6σ的偏差。对ΔS=0和ΔS=1衰变分别进行拟合，得到的参数集相差10倍，表明SU(3)_F破缺程度达1000%，显著大于SM中预期的约30%破缺。本研究已扩展至包含η和η'介子的末态。在SU(3)_F对称性假设下进行的全局拟合结果更差，与SM的偏差达4.1σ。当施加理论约束|\widetilde C/\widetilde T|=0.2或\widetilde A=0时，拟合结果进一步恶化，偏差接近5σ。这些结果暗示这些衰变中存在新物理贡献。
英文摘要
The decays $B\to PP$, where the pseudoscalar $P$ is a $π$ or $K$, have been studied under the assumption of flavour SU(3) symmetry [SU(3)$_F$]. The global fit shows a 3.6$σ$ discrepancy with the Standard Model (SM). Separate fits for $ΔS = 0$ and $ΔS = 1$ decays find parameter sets that differ by a factor of 10, suggesting 1000% SU(3)$_F$ breaking, significantly larger than the $\sim$ 30% breaking expected in the SM. This study has been extended to include final states with $η$ and $η'$ mesons. The resulting global fit, once again under the assumption of SU(3)$_F$ symmetry, is worse, with a 4.1$σ$ deviation from the SM. When theoretical constraints $|\widetilde C/\widetilde T| = 0.2$ or $\widetilde A = 0$ are imposed, the fits worsen, with the discrepancy approaching 5$σ$. These results hint at new-physics contributions to these decays.
Comments7 pages, contribution to the Proceedings of the XVI International Conference on Beauty, Charm, Hyperons in Hadronic Interactions (BEACH 2026), 7-12 June 2026, Firenze, Italy
