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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1503.06199hep-ph
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$b\to s$测量的意义

Implications of $b\to s$ measurements

Wolfgang Altmannshofer, David M. Straub

摘要:

最近更新的角度分析的$B\to K^*μ^+μ^-$衰减的LHCb合作进行解释,通过执行一个全球性的适合所有相关的测量探测味道变化的中性电流$b\to sμ^+μ^-$过渡。结果表明,与标准模型的期望值相比,$3.7σ$更倾向于用新物理修正Wilson系数$C_9$的解.张力甚至增加到$4.2σ$,也包括$b\to se^+e^-$测量,并假设新的物理只影响μ子模式。还讨论了其他新的物理基准。$C_9$位移的$q^2$依赖性被建议作为一种手段,以确定紧张的起源-新的物理或一个意想不到的大强子效应。

英文摘要:

The recent updated angular analysis of the $B\to K^*μ^+μ^-$ decay by the LHCb collaboration is interpreted by performing a global fit to all relevant measurements probing the flavour-changing neutral current $b\to sμ^+μ^-$ transition. A significant tension with Standard Model expectations is found. A solution with new physics modifying the Wilson coefficient $C_9$ is preferred over the Standard Model by $3.7σ$. The tension even increases to $4.2σ$ including also $b\to se^+e^-$ measurements and assuming new physics to affect the muonic modes only. Other new physics benchmarks are discussed as well. The $q^2$ dependence of the shift in $C_9$ is suggested as a means to identify the origin of the tension - new physics or an unexpectedly large hadronic effect.

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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