We assume that the Higgs boson or a possible resonance-playing a role in strongly interacting models of electroweak symmetry breaking-has been discovered at the LHC, and we propose a search strategy to determine its spin based on two simple asymmetries in the ZZ, W+W-, and tt̄ decay channels. We consider some benchmark values for its mass (above the ZZ threshold, in the interval from 182GeV/c2 to 1TeV/c2) and discuss the relative advantages of the different decay processes. A full analysis, including the background, is given. For a center-of-mass energy of 14 TeV, we find that the lowest integrated luminosity required to discriminate between the different spins is, depending on the process and the resonance mass, between 40fb -1 and 250fb-1.

Physical Review D - Particles, Fields, Gravitation and Cosmology
Ottawa-Carleton Institute for Physics

De Sanctis, U. (U.), Fabbrichesi, M. (M.), & Tonero, A. (2011). Telling the spin of the "higgs boson" at the LHC. Physical Review D - Particles, Fields, Gravitation and Cosmology, 84(1). doi:10.1103/PhysRevD.84.015013