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Gluon induced contributions to WZ and Wγ production at NNLO

Adamson, K.L.; de Florian, D.; Signer, A.

Authors

K.L. Adamson

D. de Florian

A. Signer



Abstract

We calculate the contribution of the partonic processes gg→WZqq̅ and gg→Wγqq̅ to WZ and Wγ pair production at hadron colliders, including anomalous triple gauge-boson couplings. We use the helicity method and include the decay of the W and Z bosons into leptons in the narrow-width approximation. In order to integrate over the qq̅ final state phase space we use an extended version of the subtraction method to NNLO and remove collinear singularities explicitly. Because of the large gluon density at low x, the gluon induced terms of vector-boson pair production are expected to be the dominant NNLO QCD correction, relevant at CERN LHC energies. However, we show that due to a cancellation they turn out to provide a rather small contribution, anticipating good stability for the perturbative expansion.

Citation

Adamson, K., de Florian, D., & Signer, A. (2002). Gluon induced contributions to WZ and Wγ production at NNLO. Physical Review D, Particles and fields, 65, https://doi.org/10.1103/physrevd.65.094041

Journal Article Type Article
Publication Date 2002-05
Deposit Date Apr 28, 2008
Publicly Available Date Mar 29, 2024
Journal Physical Review D, Particles and fields
Print ISSN 0556-2821
Electronic ISSN 1089-4918
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 65
DOI https://doi.org/10.1103/physrevd.65.094041
Keywords Boson pair production, To-leading order, W+/-Z production, Hadron colliders, QCD corrections, Gauge-theory, Infrared behavior, Amplitudes, Factorization, Couplings.

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