67 research outputs found
Parton-shower effects on Higgs boson production via vector-boson fusion in association with three jets
We present an implementation of Higgs boson production via vector-boson
fusion in association with three jets at hadron colliders in the POWHEG-BOX, a
framework for the matching of NLO-QCD calculations with parton-shower programs.
Our work provides the means to precisely describe the properties of extra jet
activity in vector-boson fusion reactions that are used for the suppression of
QCD backgrounds by central jet veto techniques. For a representative setup at
the CERN LHC we verify that uncertainties related to parton-shower effects are
mild for distributions related to the third jet, in contrast to what has been
observed in calculations based on vector-boson fusion induced Higgs production
in association with two jets.Comment: 12 pages, 8 figure
Release Note -- Vbfnlo-2.6.0
Vbfnlo is a flexible parton level Monte Carlo program for the simulation of
vector boson fusion (VBF), double and triple vector boson (plus jet) production
in hadronic collisions at next-to-leading order (NLO) in the strong coupling
constant, as well as Higgs boson plus two jet production via gluon fusion at
the one-loop level. This note briefly describes the main additional features
and processes that have been added in the new release -- Vbfnlo Version 2.6.0.
At NLO QCD diboson production (W\gamma, WZ, ZZ, Z\gamma and \gamma\gamma),
same-sign W pair production via vector boson fusion and the process
W\gamma\gamma j have been implemented (for which one-loop tensor integrals up
to six-point functions are included). In addition, gluon induced diboson
production can be studied separately at the leading order (one-loop) level. The
diboson processes WW, WZ and W\gamma can be run with anomalous gauge boson
couplings, and anomalous couplings between a Higgs and a pair of gauge bosons
is included in WW, ZZ, Z\gamma and \gamma\gamma diboson production. The code
has also been extended to include anomalous gauge boson couplings for single
vector boson production via VBF, and a spin-2 model has been implemented for
diboson pair production via vector boson fusion.Comment: 14 pages, 6 tables; new code available at
http://www-itp.particle.uni-karlsruhe.de/vbfnlo
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