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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1609.06310hep-ph
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标准模型及其以外的弱辐射Higgs衰变

Exclusive Weak Radiative Higgs Decays in the Standard Model and Beyond

Stefan Alte, Matthias König, Matthias Neubert

摘要:

我们利用QCD因子分解方法对Higgs衰变$h\to MZ$和$h\to MW$进行了详细的研究,其中$M$是赝标或矢量介子.我们允许存在新的物理效应,以修改后的希格斯耦合的形式来测量玻色子和费米子,包括改变希格斯耦合的可能性。我们发现,衰变$h\to VZ$表现出很强的敏感性,有效的CP偶和CP奇$hγZ$耦合。当与$h\toγZ$衰减速率的测量相结合时,这可以用于提取这些耦合,直到CP奇系数中的符号模糊。某些$h\to MW$衰变模式可以用来探测顶夸克中违反味道的希格斯耦合。

英文摘要:

We perform a detailed study of the exclusive Higgs decays $h\to MZ$ and $h\to MW$, where $M$ is a pseudoscalar or vector meson, using the QCD factorization approach. We allow for the presence of new-physics effects in the form of modified Higgs couplings to gauge bosons and fermions, including the possibility of flavor-changing Higgs couplings. We show that the decays $h\to VZ$ exhibit a strong sensitivity to the effective CP-even and CP-odd $hγZ$ couplings. When combined with a measurement of the $h\toγZ$ decay rate, this can be used to extract these couplings up to a sign ambiguity in the CP-odd coefficient. Some of the $h\to MW$ decay modes can be used to probe for flavor-violating Higgs couplings involving the top quark.

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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