Fingerprinting Higgs suspects at the LHC

By J. Espinosa, Christophe Grojean, M. Muhlleitner, Michael Trott. 2012

225 citations recorded by the source corpus.

A bstractWe outline a method for characterizing deviations from the properties of a Standard Model (SM) Higgs boson. We apply it to current data in order to characterize up to which degree the SM Higgs boson interpretation is consistent with experiment. We find that the SM Higgs boson is consistent with the current data set at the 82 % confidence level, based on data of excess events reported by CMS and ATLAS, which are interpreted to be related to the mass scale mh ∼ 124 − 126 GeV, and on published CLs exclusion regions. We perform a global fit in terms of two parameters characterizing the deviation from the SM value in the gauge and fermion couplings of a Higgs boson. We find two minima in the global fit and identify observables that can remove this degeneracy. An update for Moriond 2012 data is included in the appendix, which finds that the SM Higgs boson is now consistent with the current data set at only the 89 % confidence level (which corresponds to ∼ 2 σ tension compared to the best fit point).

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/dbf24c154acef83d4f31f39c2a42ac80451f5d0f

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In Nuclear and High Energy Physics

Citations in the corpus

Higgs portal, fermionic dark matter, and a Standard Model like Higgs at 125 GeV (2012, result): “S collaborations. The hints of a signal are seen in several channels, pointing to a Higgs mass of roughly m h˘124 126 GeV [21,22], with the SM Higgs boson consistent with the current data at 82% C.L. [23], see also [24,25]. Those hints are supported by recent results from D0 and CDF. For updates fro”
Renormalization group scaling of Higgs operators and h → γγ decay (2013, methodology): “WB and – 10 – ∂µ|H|2∂µ|H|2 in Ref. [20] and has been used to derive some bounds on the deviations of the Higgs couplings to massive gauge bosons from electroweak precision data, see for instance Ref. [21]. Note that in the case of cZγ, the RGE eﬀect is sizeable only in the case of weak coupling gρ.g”
Reconstructing Higgs boson properties from the LHC and Tevatron data (2012, methodology): “Some authors discussed how to perform Higgs fit [15, 16], and actual fits of recent LHC data were performed in [17–19].”
Interpreting LHC Higgs results from natural new physics perspective (2012, methodology): “In order to assess compatibility with our results, in v2 we added the top right plot of figure 2, which can be directly compared to the contours in the a− c plane presented in [76, 77].”
Higgs boson self-coupling measurements using ratios of cross sections (2013, background): “It is crucial to test the Higgs sector to its full extent, measuring the couplings of the Higgs boson to gauge bosons and matter fields [6–30], and also to probe its self-interactions [31–36].”