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arXiv 1403.2648hep-phhep-ex
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低$m_{34}$下的$h \to 4 \ell$光谱:标准模型与轻新物理

The $h \to 4 \ell$ spectrum at low $m_{34}$: Standard Model vs. light New Physics

Martin Gonzalez-Alonso, Gino Isidori

摘要:

我们分析了低不变质量双轻子对($m_{34}$)离QCD共振态($Ψ$和$Υ$态)不远的运动学区域中的$h\to 4\ell$衰变。一方面,我们在考虑非微扰QCD效应的情况下,给出了标准模型下的谱的精确预测。另一方面,我们说明了这种光谱的灵敏度,新物理模型预测存在新的奇异光态。特别是,我们表明,相关模型的参数区域,以解释$(g-2)_μ$异常,可以在未来的探测通过$h\to 4\ell$衰变。

英文摘要:

We analyze $h\to 4\ell$ decays in the kinematical region where the dilepton pair of low invariant mass ($m_{34}$) is not far from QCD resonances ($Ψ$ and $Υ$ states). On the one hand, we present precise predictions of the spectrum within the Standard Model, taking into account non-perturbative QCD effects. On the other hand, we illustrate the sensitivity of this spectrum to New Physics models predicting the existence of new exotic light states. In particular, we show that parameter regions of models relevant to explain the $(g-2)_μ$ anomaly could be probed in the future by means of $h\to 4\ell$ decays.

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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