Diboson resonant production in non-custodial composite Higgs models

A Carmona,M Quirós,A Delgado,J Santiago

doi:10.1007/jhep09(2015)186

Abstract

We show that the recently reported excess in resonant diboson production can be explained in the context of non-custodial composite Higgs models. Dibosons are generated via the s-channel exchange of massive vector bosons present in these models. We discuss the compatibility of the signal excess with other diboson experimental searches. We also discuss the tension between diboson production and other experimental tests of the model that include electroweak precision data, dilepton, dijet and top pair production and show that there is a region of parameter space in which they are all compatible with the excess.

Highlights

S parameter, are expected to be in the M 2.5–3 TeV region [16,17,18,19]
We have performed detailed scans over the parameter space of the model, computing the constraints from electroweak precision tests (EWPT) and the corresponding production cross sections in all the relevant channels discussed in the previous sections
These cross sections have been computed with MG5 [59], using a model created with FeynRules [60]

Summary

Experimental status

Before trying to explain the observed excess in terms of a specific model, we have to make sure that the excess is not already ruled out by other related resonant searches. There are a number of other diboson (WW/WZ/ZZ) resonant searches performed by ATLAS and CMS in the semi-leptonic and purely leptonic channels. No significant excesses are observed in these searches and the resulting 95% C.L. bounds are reported in the first block of table 1. We show in the second and third blocks of table 1 other experimental constraints that will be relevant for the non-custodial composite Higgs model that we will use to explain the diboson excess. No significant excess is found in these channels and the 95% C.L. bounds on cross-sections are summarized in the second block of table 1. As , ν, ttand dijets have been searched for by ATLAS and CMS and the resulting 95% bounds on cross-sections are summarized in the third block of table 1. We will include all the bounds from the second and third blocks of table 1 in our numerical analysis below

Non-custodial composite Higgs models

Results

Conclusions