We detail a calculation of W gamma production in hadronic collision, at Next-to-Leading Order (NLO) QCD interfaced to a shower generator according to the POWHEG prescription supplemented with the MiNLO procedure. The fixed order result is matched to an interleaved QCD+QED parton shower, in such a way that the contribution arising from hadron fragmentation into photons is fully modeled. In general, our calculation illustrates a new approach to the fully exclusive simulation of prompt photon production processes accurate at the NLO level in QCD. We compare our predictions to those of the NLO program MCFM, which treats the fragmentation contribution in terms of a photon fragmentation functions. We also perform comparisons to available LHC data at 7TeV, for which we observe good agreement, and provide phenomenological results for physics studies of the W gamma production process at the Run II of the LHC. The new tool, which includes W leptonic decays and the contribution of anomalous gauge couplings, allows a fully exclusive, hadron-level description of the W gamma process, and is publicly available at the repository of the POWHEG BOX. Our approach can be easily adapted to deal with other relevant isolated photon production processes in hadronic collisions

Barze, L., Chiesa, M., Montagna, G., Nason, P., Nicrosini, O., Piccinini, F., et al. (2014). W-gamma production in hadronic collisions using the POWHEG plus MiNLO method. JOURNAL OF HIGH ENERGY PHYSICS, 2014(12), 1-39 [10.1007/JHEP12(2014)039].

W-gamma production in hadronic collisions using the POWHEG plus MiNLO method

Nason, Paolo;
2014

Abstract

We detail a calculation of W gamma production in hadronic collision, at Next-to-Leading Order (NLO) QCD interfaced to a shower generator according to the POWHEG prescription supplemented with the MiNLO procedure. The fixed order result is matched to an interleaved QCD+QED parton shower, in such a way that the contribution arising from hadron fragmentation into photons is fully modeled. In general, our calculation illustrates a new approach to the fully exclusive simulation of prompt photon production processes accurate at the NLO level in QCD. We compare our predictions to those of the NLO program MCFM, which treats the fragmentation contribution in terms of a photon fragmentation functions. We also perform comparisons to available LHC data at 7TeV, for which we observe good agreement, and provide phenomenological results for physics studies of the W gamma production process at the Run II of the LHC. The new tool, which includes W leptonic decays and the contribution of anomalous gauge couplings, allows a fully exclusive, hadron-level description of the W gamma process, and is publicly available at the repository of the POWHEG BOX. Our approach can be easily adapted to deal with other relevant isolated photon production processes in hadronic collisions
Articolo in rivista - Articolo scientifico
QCD Phenomenology; Hadronic Colliders; TO-LEADING ORDER; QCD CORRECTIONS; ELECTROWEAK CORRECTIONS; ATLAS; DETECTOR; ANOMALOUS COUPLINGS; PHOTON PRODUCTION; PAIR PRODUCTION; CROSS-SECTIONS; PP COLLISIONS; COLLIDERS
English
2014
2014
12
1
39
039
none
Barze, L., Chiesa, M., Montagna, G., Nason, P., Nicrosini, O., Piccinini, F., et al. (2014). W-gamma production in hadronic collisions using the POWHEG plus MiNLO method. JOURNAL OF HIGH ENERGY PHYSICS, 2014(12), 1-39 [10.1007/JHEP12(2014)039].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/217886
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