Updated global analysis of Higgs couplings
Updated global analysis of Higgs couplings
复制标题
DOI：
10.1007/jhep06(2013)103
复制
发表时间：
2013-03
影响因子：
5.4
通讯作者：
J. Ellis;T. You
中科院分区：
文献类型：
--
作者：
J. Ellis;T. You
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。在很大程度上，它是一种希格斯玻色子，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的耦合的整体分析确定它们具有与标准模型相同的相对符号。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，并在各种假设下可能看不见的希格斯玻色子衰变。
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. To a high degree of confidence, 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.