Higgs and Z boson associated production via gluon fusion in the SM and the 2HDM
arXiv:1503.01656
Abstract
We analyse the associated production of Higgs and boson via heavy-quark loops at the LHC in the Standard Model and beyond. We first review the main features of the Born production, and in particular discuss the high-energy behaviour, angular distributions and boson polarisation. We then consider the effects of extra QCD radiation as described by the loop matrix elements, and find that they dominate at high Higgs transverse momentum. We show how merged samples of 0-- and 1--jet multiplicities, matched to a parton shower can provide a reliable description of differential distributions in production. In addition to the Standard Model study, results in a generic two-Higgs-doublet-model are obtained and presented for a set of representative and experimentally viable benchmarks for , and production. We observe that various interesting features appear either due to the resonant enhancement of the cross-section or to interference patterns between resonant and non-resonant contributions.
arXiv comment29 pages, 12 figures
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