On the spin and parity of a single-produced resonance at the LHC

Sara Bolognesi, Yanyan Gao, Andrei V. Gritsan, Kirill Melnikov, Markus Schulze, Nhan V. Tran, Andrew Whitbeck

Research output: Contribution to journalConference articlepeer-review

Abstract

Both LHC experiments, ATLAS and CMS, observed a new narrow resonance near 125 GeV.We demonstrate that the spin, parity, and, more generally, the tensor structure of the boson couplings of this resonance can be obtained by studying mass and angular distributions of events where the resonance decays to pairs of gauge bosons, ZZ, WW and γγ To account for all spin correlations we calculate kinematic distributions analytically and develop a Monte Carlo generator. We also discuss how to use angular and mass distributions of the resonance decay products for optimal background rejection and for distinguishing different signal hypotheses. By the end of the 8 TeV run of the LHC, it might be possible to separate extreme hypotheses of the spin and parity of the new resonance with a confidence level of 99% or better for a wide range of models.

Original languageEnglish
Article number18010
JournalEPJ Web of Conferences
Volume49
DOIs
StatePublished - 2013
Event23rd Hadron Collider Physics Symposium 2012, HCP 2012 - Kyoto, Japan
Duration: Nov 12 2012Nov 16 2012

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