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arXiv 1503.00290hep-phhep-ex
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对Yukawa和Higgs-quark耦合普适性的约束

Constraining the Charm Yukawa and Higgs-quark Coupling Universality

Gilad Perez, Yotam Soreq, Emmanuel Stamou, Kohsaku Tobioka

摘要:

我们介绍了四种不同类型的数据驱动的分析,具有不同程度的鲁棒性,约束希格斯魅力汤川耦合的大小:(i)重铸的矢量玻色子相关,Vh,分析,搜索底对最终状态。我们使用这种模式直接和模型独立地将希格斯粒子约束到粲偶联,y_c/y_c^{SM} < 234;(ii)直接测量总宽度,y_c/y_c^{SM} < 120-140;(iii)搜索到h -> J/γ,y_c/y_c^{SM} < 220;(iv)对希格斯粒子信号强度的全局拟合,y_c/y_c^{SM} < 6.2。通过与t \bar{t} h数据的比较,我们发现,当前的数据排除了希格斯粒子以普遍方式与夸克耦合的可能性,这与标准模型(SM)的预测是一致的。最后,我们展示了如何实验合作可以进一步提高我们的直接约束约一个数量级的魅力标记,已经在新的物理搜索。

英文摘要:

We introduce four different types of data-driven analyses with different level of robustness that constrain the size of the Higgs-charm Yukawa coupling: (i) recasting the vector-boson associated, Vh, analyses that search for bottom-pair final state. We use this mode to directly and model independently constrain the Higgs to charm coupling, y_c/y_c^{SM} < 234; (ii) the direct measurement of the total width, y_c/y_c^{SM} < 120-140; (iii) the search to h -> J/ψγ, y_c/y_c^{SM} < 220; (iv) a global fit to the Higgs signal strengths, y_c/y_c^{SM} < 6.2. A comparison with t\bar{t}h data allows us to show that current data eliminates the possibility that the Higgs couples to quarks in a universal way, as is consistent with the Standard Model (SM) prediction. Finally, we demonstrate how the experimental collaborations can further improve our direct bound by roughly an order of magnitude by charm-tagging, as already used in new physics searches.

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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