The universal Higgs fit

Preprint number: CP3-Origins-2013-5 DNRF90 and DIAS-2013-5
Authors: Pier Paolo Giardino (University of Pisa & CERN), Kristjan Kannike (Scuola Normale Superiore & NICPB), Isabella Masina (University of Ferrara, CP3-Origins & DIAS), Martti Raidal (NICPB & University of Tartu), and Alessandro Strumia (University of Pisa & NICPB)
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We perform a state-of-the-art global fit to all Higgs data. We synthesise them into a ‘universal’ form, which allows to easily test any desired model. We apply the proposed methodology to extract from data the Higgs branching ratios, production cross sections, couplings and to analyse composite Higgs models, models with extra Higgs doublets, supersymmetry, extra particles in the loops, anomalous top couplings, invisible Higgs decay into Dark Matter. Best fit regions lie around the Standard Model predictions and are well approximated by our ‘universal’ fit. Latest data exclude the dilaton as an alternative to the Higgs, and disfavour fits with negative Yukawa couplings. We derive for the first time the SM Higgs boson mass from the measured rates, rather than from the peak positions, obtaining M_h = 124.2 pm 1.8 GeV.