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arXiv 2411.03440hep-phhep-exhep-lat
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利用稀有K和B衰变搜寻新的Animalcula

Hunting New Animalcula with Rare K and B Decays

Andrzej J. Buras

AI总结:

本文提出避开存在遍举与单举测定张力的$V_{cb}$、$V_{ub}$,利用稀有K和B衰变及$V_{cb}-γ$图搜寻新物理,并筛选出七个理论洁净的关键衰变。

摘要:

我们总结了近期借助稀有K和B衰变高效搜寻新的animalcula的策略,该策略避免使用$V_{cb}$和$V_{ub}$参数,因为这些参数在通过遍举衰变和单举衰变得到的测定值之间存在张力。特别地,我们更新了标准模型所预言的各种K和B衰变分支比中不依赖于$V_{cb}$的比值。我们还强调了$V_{cb}-γ$图在新物理搜寻中的作用。我们从稀有K和B衰变中选出“壮丽七衰变”,由于其理论上的洁净性,它们应在新物理搜寻中发挥主导作用:分别由Belle II和NA62近期测量的$B^+\ o K^+(K^*)ν\arν$与$K^+\ oπ^+ν\arν$,由KOTO研究的$K_L\ oπ^0ν\arν$,以及由CERN的LHCb、CMS和ATLAS实验测量的$B_{s,d}\ oμ^+μ^-$和$K_S\ oμ^+μ^-$。

英文摘要:

We summarize the recent strategy for an efficient hunting of new animalcula with the help of rare K and B decays that avoids the use of the $V_{cb}$ and $V_{ub}$ parameters that are subject to tensions between their determinations from inclusive and exclusive decays. In particular we update the values of the $V_{cb}$-independent ratios of various K and B decay branching ratios predicted by the Standard Model. We also stress the usefulness of the $V_{cb}-γ$ plots in the search for new physics. We select the magnificant seven among rare K and B decays that should play a leading role in the search for new physics due to their theoretical cleanness: $B^+\to K^+(K^*)ν\barν$ and $K^+\toπ^+ν\barν$ measured recently by Belle II and NA62, respectively, $K_L\toπ^0ν\barν$ investigated by KOTO and also $B_{s,d}\toμ^+μ^-$ and $K_S\toμ^+μ^-$ measured by the LHCb, CMS and ATLAS experiments at CERN. %

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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