$W\gamma$
               and 
                $Z\gamma$
               production at hadron colliders

Florian, Daniel de; Signer, Adrian

doi:10.1007/s100520050007

Cited by 53 publications

(46 citation statements)

References 14 publications

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“…All cross sections are calculated in the five-flavour scheme, except for processes b.1, b.7, and b.15, which are obtained in the four-flavour scheme to avoid resonant-top contributions. NLO results for V V production have been known for some time [246][247][248][249][250][251][252][253][254]256], are publicly available in MCFM and in VBFNLO [244], and are matched to parton showers in MC@NLO [26] and POWHEG [257]. NLO results for V V with up to an extra jet have been made available in POWHEG [258,259].…”

Section: Jhep07(2014)079mentioning

confidence: 99%

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

Alwall

Frederix

Frixione

et al. 2014

J. High Energ. Phys.

6,211

5,572

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We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and of the merging of matched samples that differ by light-parton multiplicities. We present a computer program, MadGraph5 aMC@NLO, capable of handling all these computations -parton-level fixed order, shower-matched, merged -in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the LHC and to a 1-TeV e + e − collider. While next-to-leading order results are restricted to QCD corrections to SM processes in the first public version, we show that from the user viewpoint no changes have to be expected in the case of corrections due to any given renormalisable Lagrangian, and that the implementation of these are well under way.

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Section: Jhep07(2014)079mentioning

confidence: 99%

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

Alwall

Frederix

Frixione

et al. 2014

J. High Energ. Phys.

6,211

5,572

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show abstract

“…FF Þ n , with the form factor exponent n set to three for h V 3 and four for h V 4 to preserve unitarity [64], where Λ FF is the approximate energy scale at which contributions from physics beyond the SM would become directly observable. The dependencies of the unitarity bounds on the aTGC parameters from the scale Λ FF calculated as in Ref.…”

Section: Limits On Triple and Quartic Gauge-boson Couplings A mentioning

confidence: 99%

Measurements ofZγandZγγproduction inppcollisions at<

Aad¹,

Abbott²,

Abdallah³

et al. 2016

Phys. Rev. D

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The production of Z bosons with one or two isolated high-energy photons is studied using pp collisions at ffiffi ffi s p ¼ 8 TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb −1 collected by the ATLAS detector during the 2012 LHC data taking. The Zγ and Zγγ production cross sections are measured with leptonic (e þ e − , μ þ μ − , νν) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy E T > 250 GeV from l þ l − γ events and with E T > 400 GeV from ννγ events are used to search for anomalous triple gauge-boson couplings ZZγ and Zγγ. The yields of events with diphoton invariant mass m γγ > 200 GeV from l þ l − γγ events and with m γγ > 300 GeV from ννγγ events are used to search for anomalous quartic gauge-boson couplings ZZγγ and Zγγγ. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings.

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“…Next-to-leading order cross sections for this process have been calculated quite some time ago [4]. Subsequently, the theoretical predictions have been improved by taking into account the leptonic decay of the Z-boson, anomalous couplings and full leptonic correlations [5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%