Geolocating the Higgs Boson Candidate at the LHC

Abstract

The latest results from the ATLAS and CMS experiments at the CERN Large Hadron Collider (LHC) unequivocally confirm the existence of a resonance, $X$, with mass near 125 GeV which could be the Higgs boson of the Standard Model. Measuring the properties (quantum numbers and couplings) of this resonance is of paramount importance. Initial analyses by the LHC collaborations disfavor specific alternative benchmark hypotheses, e.g. pure pseudoscalars or gravitons. However, this is just the first step in a long-term program of detailed measurements. We consider the most general set of operators in the decay channels $X\to ZZ$, $WW$, $Z\gamma$, $\gamma \gamma$ and derive the constraint implied by the measured rate. This allows us to provide a useful parametrization of the orthogonal independent Higgs coupling degrees of freedom as coordinates on a suitably defined sphere.

5 pages, 4 figures. Corresponds with version published in Physical Review Letters as "Spherical Parametrization of the Higgs Boson Candidate". Changes in conventions (minus signs, etc.) from previous arXiv version. Supplemental information is presented separately-- this information is part of the main document in the previous arXiv version

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• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• On the spin and parity of a single-produced resonance at the LHC
• Robust Determination of the Higgs Couplings: Power to the Data
• Aspects of CP violation in the HZZ coupling at the LHC
• Directly Measuring the Tensor Structure of the Scalar Coupling to Gauge Bosons
• Measuring spin and CP from semi-hadronic ZZ decays using jet substructure
• Higgs CP Properties From Early LHC Data
• Precision studies of the Higgs boson decay channel H -> ZZ -> 4l with MEKD
• Can the 126 GeV boson be a pseudoscalar?
• Scrutinizing the Higgs Signal and Background in the $2e2\mu$ Golden Channel
• Telling the spin of the "Higgs boson" at the LHC
• Spin Determination for Fermiophobic Bosons

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