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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1907.09237hep-ph
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解决$B^0 \to a_1^\pm π^\mp$中的$ϕ_2$($α$)歧义

Resolving the $ϕ_2$ ($α$) ambiguity in $B^0 \to a_1^\pm π^\mp$

J. Dalseno

摘要:

本文提出了一种在扩展SU(3)味对称性分析中无歧义地测量$CP$破坏相$ϕ_2$($α$)的方法,它最终可以通过利用$B \to AP$和$B \to VV$衰变道之间的干涉效应来实现,其中$A, V, P$分别表示轴矢量、矢量和赝标介子。在基于当前实验结果和最小理论输入的相关衰变的某些假设下,我用理想化的振幅模型证明了在[0,$π$ ]范围内提取$ϕ_2$的单一解的程序,同时增加了约束不可因式分解的SU(3)破缺效应的可能性,可以使用LHCb的运行3数据和最终Belle II样品以相似的精度执行。

英文摘要:

I propose an alternative method for measuring the $CP$ violating phase $ϕ_2$ ($α$) without ambiguity in an extended SU(3) flavour symmetry analysis, which can ultimately be achieved by exploiting interference effects between $B \to AP$ and $B \to VV$ decay channels, where $A, V, P$ indicates an axial-vector, vector and pseudo-scalar meson, respectively. Under certain assumptions on the relevant decays based on current experimental results and minimal theoretical input, I demonstrate with an idealised amplitude model that a programme to extract a single solution for $ϕ_2$ in the range [0,$π$], with the added possibility to simultaneously constrain non-factorisable SU(3)-breaking effects, could be executed to similar precision using Run 3 data at LHCb and the final Belle II sample.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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