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NLO QCD + EW corrections to $WWW$ production with leptonic decays at the LHC | | Shen Yong-Bai
; Zhang Ren-You
; Ma Wen-Gan
; Li Xiao-Zhou
; Guo Lei
; | | Date: |
2 May 2016 | | Abstract: | In this paper we calculate the next-to-leading order (NLO) QCD and NLO
electroweak (EW) corrections to $WWW$ production with subsequent $W$-boson
leptonic decays at the LHC by adopting an improved narrow width approximation
which takes into account the spin correlation and finite width effects from the
$W^{pm}$-boson decays. The NLO QCD correction from gluon-quark reaction
channels is discussed, which enhances significantly the NLO QCD correction in
high energy region for the transverse momentum and invariant mass distributions
of final particle. We provide also the integrated cross section for the $WWW$
production and various kinematic distributions of final products with NLO
QCD+EW accuracy. We find by applying a hard jet veto in events selection, we
can keep the convergence of the perturbative QCD description and improve the
scale uncertainty. Our numerical results show that both the NLO QCD and NLO EW
corrections should be considered in precision predictions. We see also that the
genuine NLO QCD relative correction to the integrated cross section for
$W^+W^-W^+$ production at the $14~{
m TeV}$ LHC, is $28.19\%$ in the jet veto
condition of $p^{jet}_T > p^{jet,lower}_T=50~{
m GeV}$, while the pure NLO EW
relative corrections can reach $15.15\%$ in inclusive event selection scheme. | | Source: | arXiv, 1605.0554 | | Services: | Forum | Review | PDF | Favorites | |
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