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W+W- production at Hadron Colliders in next to next to leading order QCD


Gehrmann, T; Grazzini, M; Kallweit, S; Maierhöfer, P; von Manteuffel, A; Pozzorini, S; Rathlev, D; Tancredi, L (2014). W+W- production at Hadron Colliders in next to next to leading order QCD. Physical Review Letters, 113(21):online.

Abstract

Charged gauge boson pair production at the Large Hadron Collider allows detailed probes of the fundamental structure of electroweak interactions. We present precise theoretical predictions for on-shell W+W- production that include, for the first time, QCD effects up to next to next to leading order in perturbation theory. As compared to next to leading order, the inclusive W+W- cross section is enhanced by 9% at 7 TeV and 12% at 14 TeV. The residual perturbative uncertainty is at the 3% level. The severe contamination of the W+W- cross section due to top-quark resonances is discussed in detail. Comparing different definitions of top-free W+W- production in the four and five flavor number schemes, we demonstrate that top-quark resonances can be separated from the inclusive W+W- cross section without a significant loss of theoretical precision.

Abstract

Charged gauge boson pair production at the Large Hadron Collider allows detailed probes of the fundamental structure of electroweak interactions. We present precise theoretical predictions for on-shell W+W- production that include, for the first time, QCD effects up to next to next to leading order in perturbation theory. As compared to next to leading order, the inclusive W+W- cross section is enhanced by 9% at 7 TeV and 12% at 14 TeV. The residual perturbative uncertainty is at the 3% level. The severe contamination of the W+W- cross section due to top-quark resonances is discussed in detail. Comparing different definitions of top-free W+W- production in the four and five flavor number schemes, we demonstrate that top-quark resonances can be separated from the inclusive W+W- cross section without a significant loss of theoretical precision.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:20 Feb 2015 16:05
Last Modified:21 Nov 2017 17:47
Publisher:American Physical Society
ISSN:0031-9007
Publisher DOI:https://doi.org/10.1103/PhysRevLett.113.212001

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