A fast track towards the ‘Higgs’ spin and parity

A bstract The LHC experiments ATLAS and CMS have discovered a new boson that resembles the long-sought Higgs boson: it cannot have spin one, and has couplings to other particles that increase with their masses, but the spin and parity remain to be determined. We show here that the ‘Higgs’ + gauge bo...

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Bibliographic Details
Published in:The journal of high energy physics 2012-11, Vol.2012 (11), Article 134
Main Authors: Ellis, John, Hwang, Dae Sung, Sanz, Verónica, You, Tevong
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Couplings
Elementary Particles
Higgs bosons
High energy physics
Invariants
Large Hadron Collider
Mass distribution
Parity
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Relativity Theory
Solenoids
Statistical analysis
Statistical methods
String Theory
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Summary:A bstract The LHC experiments ATLAS and CMS have discovered a new boson that resembles the long-sought Higgs boson: it cannot have spin one, and has couplings to other particles that increase with their masses, but the spin and parity remain to be determined. We show here that the ‘Higgs’ + gauge boson invariant-mass distribution in ‘Higgs’-strahlung events at the Tevatron or the LHC would be very different under the J P =0 + , 0 − and 2 + hypotheses. Ouranalysisisbasedonsimulationsoftheexperimental event selections and cuts using PYTHIA and Delphes, and incorporates statistical samples of ‘toy’ experiments. The observation of ‘Higgs’-strahlung at the Tevatron and the expected peaking of backgrounds at low invariant masses suggest that this process could provide a fast-track indicator of the ‘Higgs’ spin and parity.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2012)134