Robust Determination of the Higgs Couplings: Power to the Data
By T. Corbett, O. Éboli, M. Gonzalez-Garcia, J. Gonzalez-Fraile. 2012
197 citations recorded by the source corpus.
We study the indirect effects of new physics on the phenomenology of the recently discovered “Higgs-like” particle. In a model independent framework these effects can be parametrized in terms of an effective Lagrangian at the electroweak scale. In a theory in which the SU(2)L ×U(1)Y gauge symmetry is linearly realized they appear at lowest order as dimension–six operators, containing all the SM fields including the light scalar doublet, with unknown coefficients. We discuss the choice of operator basis which allows us to make better use of all the available data on the new state, triple gauge boson vertex and electroweak precision tests, to determine the coefficients of the new operators. We illustrate our present knowledge of those by performing a global fit to the existing data which allows simultaneous determination of the eight relevant parameters quantifying the Higgs couplings to gluons, electroweak gauge bosons, bottom quarks, and tau leptons. We find that for all scenarios considered the standard model predictions for each individual Higgs coupling and observable are within the corresponding 68% CL allowed range. We finish by commenting on the implications of the results for unitarity of processes at higher energies.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/528817658a73689d59f282af718ab1e01f4d4f4d
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In Nuclear and High Energy Physics
Citations in the corpus
- Model-independent precision constraints on dimension-6 operators (2014, background): “Much of recent work has been focused on connecting these operators to observables that can be measured in colliders, and to derive experimental constraints on their coefficients [5–16].”
- Complete Higgs sector constraints on dimension-6 operators (2014, background): “For an analysis of the above operators and TGCs, see Ref.”
- A Bayesian view of the Higgs sector with higher dimensional operators (2013, background): “[3–14] for studies based on the 8 TeV results).”
- Emergence of the electroweak scale through the Higgs portal (2013, background): “7 at 1 sigma [53–60], which is the combined result of the discovery channels h → WW,ZZ, γγ.”
- Renormalization group evolution of the Standard Model dimension six operators III: gauge coupling dependence and phenomenology (2013, unknown): “[20, 56, 63, 64] and other works.”
- Electroweak radiative corrections for collider physics (2019, background): “Other bases were proposed, and different authors prefer to use different sets of operator bases, motivated by different expectations for the form of new physics [66, 67, 119–125].”