Abstract
We present predictions for the associated production of a Higgs boson at NLO+PS accuracy, including the effect of anomalous interactions between the Higgs and gauge bosons. We present our results in different frameworks, one in which the interaction vertex between the Higgs boson and Standard Model $W$ and $Z$ bosons is parameterized in terms of general Lorentz structures, and one in which Electroweak symmetry breaking is manifestly linear and the resulting operators arise through a six-dimensional effective field theory framework. We present analytic calculations of the Standard Model and Beyond the Standard Model contributions, and discuss the phenomenological impact of the higher order pieces. Our results are implemented in the NLO Monte Carlo program MCFM, and interfaced to shower Monte Carlos through the {\sc Powheg} box framework.
Highlights
These, associated production — which occurs through an s-channel production mechanism — is appealing, since one can directly probe the high energy behaviour of the interaction through, for instance, the invariant mass of the Higgs Vector system, mV H
We present our results in different frameworks, one in which the interaction vertex between the Higgs boson and Standard Model W and Z bosons is parameterized in terms of general Lorentz structures, and one in which Electroweak symmetry breaking is manifestly linear and the resulting operators arise through a six-dimensional effective field theory framework
In this paper we focus on the effects of heavy New Physics in production of a Higgs boson in association with a vector boson
Summary
These, associated production — which occurs through an s-channel production mechanism — is appealing, since one can directly probe the high energy behaviour of the interaction through, for instance, the invariant mass of the Higgs Vector system, mV H. A simple way to encode effects of new physics in the Higgs sector is to study Higgs anomalous couplings (HAC) [1, 2] This parametrization does not rely on assumptions about whether EWSB is linearly or non-linearly realized, as it only relies on the Higgs as a scalar degree of freedom and the preservation of U(1)EM , i.e. by saturating all possible Lorentz structures in the vertex with the lowest number of derivatives. An alternative way to describe indirect effects of new physics is to use an Effective Field Theory (EFT) approach Within this approach, one could assume a linear realization of EWSB with the Higgs as a doublet of SU(2), and write down all the relevant operators which satisfy SU(2)L × U(1)Y [6]. Unless otherwise stated, the process we study in this paper corresponds to q(p1) + q(p2) → V (→ 1(p3) + 2(p4)) + H(→ b(p5) + b(p6))
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