| Literature DB >> 31598096 |
Mauro Chiesa1, Ansgar Denner1, Jean-Nicolas Lang2, Mathieu Pellen3.
Abstract
In this article we present an event generator based on the Monte Carlo program Powheg in combination with the matrix-element generator Recola. We apply it to compute NLO electroweak corrections to same-sign W-boson scattering, which have been shown to be large at the LHC. The event generator allows for the generation of unweighted events including the effect of the NLO electroweak corrections matched to a QED parton shower and interfaced to a QCD parton shower. In view of the expected experimental precision of future measurements, the use of such a tool will be indispensable.Entities:
Year: 2019 PMID: 31598096 PMCID: PMC6759691 DOI: 10.1140/epjc/s10052-019-7290-6
Source DB: PubMed Journal: Eur Phys J C Part Fields ISSN: 1434-6044 Impact factor: 4.590
Fig. 1Graphical representation of the two diagrams with the highest number of massive resonances for . The resonances of any other contribution can be matched to one of the resonances in these two diagrams
Cross sections at LO [] and NLO EW [] for and at the LHC. The relative EW corrections are given in per cent, and the digits in parenthesis indicate the integration error
| Process | |||
|---|---|---|---|
Fig. 2Differential distributions at LO [order ] and NLO EW [order ] for a centre-of-mass energy at the LHC for and : a transverse momentum of the hardest jet (top left), b invariant mass of the two leading jets (top right), c rapidity of the two leading jets (bottom left), and d invariant mass of the four leptons (bottom right). The upper panels show the two LO contributions as well the two NLO predictions. The lower panels show the relative NLO corrections with respect to the corresponding LO in per cent
Cross sections at NLO EW [order ] for at the LHC. These have been obtained with Powheg+Recola (this work, abbreviated P+R) with the flag allrad off/on and MoCaNLO+Recola (Ref. [7]). The digits in parenthesis indicate the integration error
| Prediction | |||
|---|---|---|---|
| 1.300(5) | 1.302(5) | 1.2895(6) |
Fig. 3Comparison of differential distributions between Powheg+Recola (this work) and MoCaNLO+Recola (Ref. [7]) at NLO EW [order ] at a centre-of-mass energy at the LHC for : a invariant mass of the two leading jets (left), and b rapidity difference of the two leading jets (right). The upper panels show the two NLO predictions. The lower panels display the relative difference between the two computations with the corresponding statistical error bars dominated by the Powheg+Recola predictions
Fig. 4Differential distributions at LO [order ], NLO EW [order ] and NLO EW+PS at a centre-of-mass energy at the LHC for : a invariant mass of the two leading jets (top left), b rapidity difference of the two leading jets (top right), c transverse momentum of the hardest jet (bottom left), and d missing transverse energy (bottom right). The upper panels show the LO prediction as well as the NLO predictions with and without PS. The lower panels show the relative NLO corrections with respect to the corresponding LO in per cent