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arXiv 2305.03076hep-ph
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高 q^2 区域的半单举 b→sℓℓ 跃迁

Semi-inclusive $b\to s\bar{\ell}\ell$ transitions at high $q^2$

Gino Isidori, Zachary Polonsky, Arianna Tinari

AI总结:

本文更新了高 q^2 区域单举 b→sℓℓ 衰变率的标准模型估计,发现其与 K、K* 及非共振 Kπ 道预言之和一致,而 μ 子末态数据相对标准模型存在不超过 2σ 的亏缺,并与低 q^2 排他末态亏缺相容。

摘要:

我们给出了高双轻子不变质量(q^2≥15 GeV^2)区域单举 b→sℓℓ 衰变率的更新版标准模型(SM)估计。我们表明,该估计与将主导单体末态(K 和 K*)以及次主导的非共振 Kπ 道(我们也给出了其更新估计)的标准模型预言相加所得结果高度一致。相反,基于数据的半单举求和结果在 μ 子末态中相对于单举标准模型预言存在亏缺。该亏缺的统计显著性不超过 2σ,但不依赖于强子形状因子的不确定性,并且与在低 q^2 区域排他末态中观测到的亏缺完全相容。我们还简要讨论了这些结果与其他针对 b→sμμ 末态的标准模型检验相结合的意义。

英文摘要:

We present an updated Standard Model (SM) estimate of the inclusive $b\to s\bar{\ell}\ell$ rate at high dilepton invariant mass ($q^2\geq 15~{\rm GeV}^2$). We show that this estimate is in good agreement with the result obtained summing the SM predictions for the leading one-body modes ($K$ and $K^*$) and the subleading non-resonant $Kπ$ channel (for which we also present an updated estimate). On the contrary, the semi-inclusive sum based on data exhibits a deficit compared to the inclusive SM prediction in the muon modes. The statistical significance of this deficit does not exceed $2σ$, but is free from uncertainties on hadronic form factors, and fully compatible with the deficit observed at low-$q^2$ on the exclusive modes. The implications of these results in conjunction with other SM tests on $b\to s\barμμ$ modes are briefly discussed.

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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