Diphotons from an Electroweak Triplet-Singlet
Abstract
The neutral component of a real pseudoscalar electroweak (EW) triplet can produce a diphoton excess at 750 GeV, if it is somewhat mixed with an EW singlet pseudoscalar. This triplet-singlet mixing allows for greater freedom in the diboson branching ratios than the singlet-only case, but it is still possible to probe the parameter space extensively with 300 fb. The charged component of the triplet is pair-produced at the LHC, which results in a striking signal in the form of a pair of resonances with an irreducible rate of 0.27 fb. Other signatures include multiboson final states from cascade decays of the triplet-singlet neutral states. A large class of composite models feature both EW singlet and triplet pseudo-Nambu Goldstone bosons in their spectrum, with the diboson couplings generated by axial anomalies.
Cite
@article{arxiv.1603.08932,
title = {Diphotons from an Electroweak Triplet-Singlet},
author = {Kiel Howe and Simon Knapen and Dean J. Robinson},
journal= {arXiv preprint arXiv:1603.08932},
year = {2016}
}
Comments
36 pages, 7 figures