NLO QCD and electroweak corrections to WWW production at the LHC
May 2, 2016
10 pages
Published in:
- Phys.Rev.D 95 (2017) 7, 073005
- Published: Apr 19, 2017
e-Print:
- 1605.00554 [hep-ph]
View in:
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Abstract: (APS)
In this paper we calculate the next-to-leading order (NLO) QCD [O(αsα3)] and electroweak (EW) [O(α4)] corrections to the WWW production at the LHC and deal with the subsequent leptonic decays from W bosons by adopting an improved narrow-width approximation which takes into account the spin correlation and finite-width effects. The NLO QCD correction from the real jet radiation is discussed, which significantly enhances the production rate, particularly in the high-energy region. We also provide the integrated cross section for the WWW production and various kinematic distributions of final products at the QCD+EW NLO. We find that the convergence of the perturbative QCD description can be improved by applying a hard jet veto in the event selection, but this jet veto would introduce a new source of theoretical uncertainty. The pure NLO QCD relative correction to the integrated cross section for the W+W-W+ production at the 14 TeV LHC is on the order of 30% in the jet-veto event selection scheme with pT,jetcut=50 GeV, while the genuine NLO EW relative correction can reach about 15% in the inclusive event selection scheme. Our numerical results show that both the NLO QCD and NLO EW corrections should be taken into consideration in precision predictions.Note:
- 25 pages, 6 figures
- CERN LHC Coll
- p p: scattering
- W: multiple production
- W: leptonic decay
- W: width
- width: finite
- approximation: narrow resonance
- quantum chromodynamics: correction
- electroweak interaction: correction
- correction: higher-order
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