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arXiv 2212.09595hep-lat
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奇异超子衰变$\Sigma^+ \to p \ell^+ \ell^-$的探索性计算研究进展

Progress on the exploratory calculation of the rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$

Felix Erben, Vera Gülpers, Maxwell T. Hansen, Raoul Hodgson, Antonin Portelli

AI总结:

针对奇异超子衰变$\Sigma^+ \to p \ell^+ \ell^-$的实验测量进展,研究者作为RBC-UKQCD合作组成员,利用340 MeV π介子质量系综和畴壁费米子,开展该衰变形状因子长程部分的首次探索性格点计算,以提升标准模型预测精度、辅助新物理探测。

摘要:

奇异超子衰变$\Sigma^+ \to p \ell^+ \ell^-$是一种$s \to d$味改变中性流过程,在标准模型中受到高度压制,因此对新物理敏感。由于近期该衰变的实验测量精度有所提升,必须同时改进标准模型的理论预测,以识别该衰变道中可能存在的新物理。我们汇报了针对该衰变形状因子长程部分的首次探索性格点计算的最新进展。这项试点计算在340 MeV的π介子质量系综上开展,采用畴壁费米子,是RBC-UKQCD合作组工作的一部分。

英文摘要:

The rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$ is an $s \to d$ flavour changing neutral current process, which is highly suppressed within the Standard Model, and is therefore sensitive to new physics. Due to recent improvements in experimental measurements of this decay, the Standard Model theory prediction must also be improved in order to identify any new physics in this channel. We present updates on our progress towards the first exploratory lattice calculation of the long-distance part of the form factors of this decay. This pilot calculation is performed on a 340 MeV pion mass ensemble using domain-wall fermions as part of the RBC-UKQCD collaboration.

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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