Updated global analysis of Higgs couplings

By John Ellis, T. You. 2013

223 citations recorded by the source corpus.

A bstractThere 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.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c5cb26b909842b2caadd1157d7a5b08475d4a9a4

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Citations in the corpus

Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC (2014, unknown): “This is also of interest for other implementations of χ2 tests against Higgs mass and rate measurements [14–28, 34–63], which employ different levels of detail concerning the implementation”
Dark nuclei. I. Cosmology and indirect detection (2014, background): “There are already strong constraints on the allowed mixing angle, and we thus assume this mixing is small, below the ∼ few% level [49–52].”
First look at the physics case of TLEP (2013, methodology): “s around 125 GeV recently discovered by the ATLAS and CMS experiments [1,2] at the LHC is found to have properties compatible with the Standard Model predictions [3,4], as shown for example in Fig. 1 [5]. Coupled with the absence of any other indication so far for new physics at the LHC, be it eithe”
Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector (2017, unknown): “This "effective" coupling is determined by introducing fit parameters e and M [114] to the standard lepton y f = √ 2 (m f M )1+e → √ 2 m f v , (8.”
Constraints on new phenomena via Higgs boson couplings and invisible decays with the ATLAS detector (2015, background): “The coupling scale factors to different species of fermions and vector bosons, respectively, are expressed in terms of the parameters [ , M ] [46], where is a mass scaling parameter and M is a “vacuum expectation value” parameter whose SM value is v ≈ 246 GeV: κF,i = v m F,i M1+”
Mass effects in the Higgs-gluon coupling: boosted vs. off-shell production (2014, background): “This is obvious when we look at our currently very limited and model-dependent understanding of the top Yukawa coupling [8–24].”