Phys.Rev. D94 (2016) 053002

by: Degrande, Celine (Durham U., IPPP) et al.

Motivated by TeV-scale neutrino mass models, we propose a systematic treatment of heavy neutrino (N) production at hadron colliders. Our simple and efficient modeling of the vector boson fusion (VBF) W±γ→Nℓ± and Nℓ±+nj signal definitions resolve collinear and soft divergences that have plagued past studies, and is applicable to other color-singlet processes, e.g., associated Higgs (W±h), sparticle (ℓ˜±νℓ˜), and charged Higgs (h±±h∓) production. We present, for the first time, a comparison of all leading N production modes, including both gluon fusion (GF) gg→Z*/h*→Nνℓ(-) and VBF. We obtain fully differential results up to next-to-leading order (NLO) in QCD accuracy using a Monte Carlo tool chain linking feynrules, nloct, and madgraph5_amc@nlo. Associated model files are publicly available. At the 14 TeV LHC, the leading order GF rate is small and comparable to the NLO Nℓ±+1j rate; at a future 100 TeV Very Large Hadron Collider, GF dominates for mN=300–1500  GeV, beyond which VBF takes the lead.
Publ date: 
Wednesday, February 24, 2016 - 03:38