Multi-Photon Signals from Composite Models at LHC

Details Multi-Photon Signals from Composite Models at LHC Multi-Photon Signals from Composite Models at LHC

2010-10-12

arxiv.org/abs/1010.2528v1

JHEP 1101:022,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, LaTeX

Scientific paper

10.1007/JHEP01(2011)022

We analyze the collider signals of composite scalars that emerge in certain little Higgs models and models of vectorlike confinement. Similar to the decay of the pion into photon pairs, these scalars mainly decay through anomaly-induced interactions into electroweak gauge bosons, leading to a distinct signal with three or more photons in the final state. We study the standard model backgrounds for these signals, and find that the LHC can discover these models over a large range of parameter space with 30 fb$^{-1}$ at 14 TeV. An early discovery at the current 7 TeV run is possible in some regions of parameter space. We also discuss possibilities to measure the spin of the particles in the $\gamma \gamma $ and $Z\gamma $ decay channels.

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