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arXiv 1303.3879hep-phhep-ex
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希格斯耦合的最新全球分析

Updated Global Analysis of Higgs Couplings

John Ellis, Tevong You

摘要:

有许多间接和直接的实验表明,ATLAS和CMS合作发现的新粒子H具有自旋零和(大多数)正宇称,并且它与其他粒子的耦合与它们的质量相关。毫无疑问,它是一个希格斯玻色子,在这里我们研究它的耦合在多大程度上类似于标准模型中的单个希格斯玻色子。我们对它与费米子和大质量玻色子耦合的整体分析确定,它们与标准模型中的相对符号相同。我们还直接表明,这些耦合是高度一致的依赖于粒子的质量,是线性的几个百分点内,并按比例缩放的传统的电弱磁破碎规模在10%以内。我们还给出了环诱导耦合的限制,总希格斯衰变宽度,并在各种假设下的希格斯玻色子玻色子可能看不见的衰变。

英文摘要:

There are many indirect and direct experimental indications that the new particle H discovered by the ATLAS and CMS Collaborations has spin zero and (mostly) positive parity, and that its couplings to other particles are correlated with their masses. Beyond any reasonable doubt, it is a Higgs boson, and here we examine the extent to which its couplings resemble those of the single Higgs boson of the Standard Model. Our global analysis of its couplings to fermions and massive bosons determines that they have the same relative sign as in the Standard Model. We also show directly that these couplings are highly consistent with a dependence on particle masses that is linear to within a few %, and scaled by the conventional electroweak symmetry-breaking scale to within 10%. We also give constraints on loop-induced couplings, on the total Higgs decay width, and on possible invisible decays of the Higgs boson under various assumptions.

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