NNLOPS accurate predictions for W+W− production

Author:

Re Emanuele,Wiesemann Marius,Zanderighi Giulia

Abstract

Abstract We present novel predictions for the production of W + W pairs in hadron collisions that are next-to-next-to-leading order accurate and consistently matched to a parton shower (NNLOPS). All diagrams that lead to the process $$ pp\to {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }+X $$ pp e ν ¯ e μ + ν μ + X are taken into account, thereby including spin correlations and off-shell effects. For the first time full NNLOPS accuracy is achieved for a 2 → 4 process. We find good agreement, at the 1σ level, with the W + W rates measured by ATLAS and CMS. The importance of NNLOPS predictions is evident from differential distributions sensitive to soft-gluon effects and from the large impact (10% and more) of including next-to-next-to-leading order corrections on top of MiNLO. We define a charge asymmetry for the W bosons and the leptons in W + W production at the LHC, which is sensitive to the W polarizations and hence can be used as a probe of new physics.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

Reference154 articles.

1. CDF collaboration, T. Aaltonen et al., Measurement of the W + W − production cross section and search for anomalous W W γ and W W Z couplings in $$ p\overline{p} $$ collisions at $$ \sqrt{s}=1.96 $$ TeV, Phys. Rev. Lett. 104 (2010) 201801 [arXiv:0912.4500] [INSPIRE].

2. D0 collaboration, V.M. Abazov et al., Measurements of W W and W Z production in W + jets final states in pp collisions, Phys. Rev. Lett. 108 (2012) 181803 [arXiv:1112.0536] [INSPIRE].

3. ATLAS collaboration, Measurement of W + W − production in pp collisions at $$ \sqrt{s}=7 $$ TeV with the ATLAS detector and limits on anomalous W W Z and W W γ couplings, Phys. Rev. D 87 (2013) 112001 [Erratum ibid. D 88 (2013) 079906] [arXiv:1210.2979] [INSPIRE].

4. CMS collaboration, Measurement of the W + W − cross section in pp collisions at $$ \sqrt{s}=7 $$ TeV and limits on anomalous W W γ and W W Z couplings, Eur. Phys. J. C 73 (2013) 2610 [arXiv:1306.1126] [INSPIRE].

5. ATLAS collaboration, Measurement of the W + W − production cross section in proton-proton collisions at $$ \sqrt{s}=8 $$ TeV with the ATLAS detector, ATLAS-CONF-2014-033 (2014).

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