Reconstructing Higgs boson properties from the LHC and Tevatron data

By Pier Paolo Giardino, K. Kannike, M. Raidal, Alessandro Strumia. 2012

182 citations recorded by the source corpus.

A bstractWe perform a phenomenological fit to all ATLAS, CMS, CDF and D0 Higgs boson data available after Moriond 2012. We allow all Higgs boson branching fractions, its couplings to standard model particles, as well as to an hypothetical invisible sector to vary freely, and determine their current favourite values. The standard model Higgs boson with a mass 125 GeV correctly predicts the average observed rate and provides an acceptable global fit to data. However, better fits are obtained by non-standard scenarios that reproduce anomalies in the present data (more γγ and less WW signals than expected) such as modified rates of loop processes or partial fermiophobia. We find that present data disfavours Higgs boson invisible decays. We consider implications for the standard model, for supersymmetric and fermiophobic Higgs bosons, for dark matter models, for warped extra-dimensions.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e0496a8528bc5104fea813e65ee28db3a93c4ed8

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Citations in the corpus

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].”
A Higgs conundrum with vector fermions (2012, background): “[88] Pier Paolo Giardino, Kristjan Kannike, Martti Raidal, and Alessandro Strumia.”
$Z_3$ Scalar Singlet Dark Matter (2012, background): “Allowing for less than 40% invisible width of the Higgs [18, 35], rules out most MS < Mh/2 points.”
Status of invisible Higgs decays (2013, background): “in [5–8] and within the MSSM in [9].”
The universal Higgs fit (2013, methodology): “In almost all measured rates (with the exception of the last data-point in figure 1: the direct measurement of the invisible Higgs width) BRinv is equivalent to a common reduction r of all the other Higgs couplings, BRinv ' 1 − r2, such that BRinv is indirectly probed by data [37].”