First glimpses at higgs' face

J. R. Espinosa, C. Grojean, M. Mühlleitner, M. Trott

    Research output: Contribution to journalArticleResearchpeer-review

    148 Citations (Scopus)


    The 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to other Standard Model (SM) particles. We discuss and characterize to what degree this resonance has the properties of the SM Higgs, and consider what implications can be extracted for New Physics in a (mostly) model-independent fashion. We find that, if the Higgs couplings to fermions and weak vector bosons are allowed to differ from their standard values, the SM is ~ 2σ from the best fit point to the current data. Fitting to a possible invisible decay branching ratio, we find BRinv ≃ 0.05 ± 0.32 (95% C.L.). We also discuss and develop some ways of using the data in order to bound or rule out models which modify significantly the properties of this scalar resonance, and apply these techniques to the current global dataset. © 2012 SISSA.
    Original languageEnglish
    Article number045
    JournalJournal of High Energy Physics
    Issue number12
    Publication statusPublished - 1 Dec 2012


    • Beyond Standard Model
    • Higgs Physics


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