EPJ Web of Conferences
Volume 49, 2013HCP 2012 – Hadron Collider Physics Symposium 2012
|Number of page(s)||3|
|Published online||20 May 2013|
On the spin and parity of a single-produced resonance at the LHC
1 Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
2 Fermi National Accelerator Laboratory (FNAL),, Batavia, IL 60510, USA
3 Argonne National Laboratory (ANL), Lemont, IL 60439, USA
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.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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