Extracting Higgs boson couplings from CERN LHC data

We show how LHC Higgs boson production and decay data can be used to extract gauge and fermion couplings of Higgs bosons. We show that very mild theoretical assumptions, which are valid in general multi-Higgs doublet models, are sufficient to allow the extraction of absolute values for the couplings...

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Bibliographic Details
Main Authors: Duhrssen, M., Heinemeyer, S., Logan, H., Rainwater, D., Weiglein, G., Zeppenfeld, D.
Format: Report
Language:English
Subjects:
fermion
gauge boson
GeV-cms
Higgs particle: coupling
Higgs particle: decay modes
Higgs particle: hadroproduction
Higgs particle: mass
Higgs particle: multiplet
Higgs particle: width
numerical calculations: CERN LHC Coll
p p: inclusive reaction
supersymmetry
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Summary:We show how LHC Higgs boson production and decay data can be used to extract gauge and fermion couplings of Higgs bosons. We show that very mild theoretical assumptions, which are valid in general multi-Higgs doublet models, are sufficient to allow the extraction of absolute values for the couplings rather than just ratios of the couplings. For Higgs masses below 200 GeV we find accuracies of 10-40% for the Higgs boson couplings and total width after several years of LHC running. Slightly stronger assumptions on the Higgs gauge couplings even lead to a determination of couplings to fermions at the level of 10-20%. We also study the sensitivity to deviations from SM predictions in several supersymmetric benchmark scenarios as a subset of the analysis.
ISSN:1550-7998
2470-0029
0556-2821
2470-0010
1089-4918
1550-2368
DOI:10.3204/pubdb-2017-05005