Jet pair production in POWHEG

By Simone Alioli, K. Hamilton, P. Nason, Carlo Oleari, E. Re. 2010

301 citations recorded by the source corpus.

We present an implementation of the next-to-leading order dijet production process in hadronic collisions in the framework of POWHEG, which is a method to implement NLO calculations within a shower Monte Carlo context. In constructing the simulation, we have made use of the POWHEG BOX toolkit, which makes light of many of the most technical steps. The majority of this article is concerned with the study of the predictions of the Monte Carlo simulation. In so doing, we validate our program for use in experimental analyses, elaborating on some of the more subtle features which arise from the interplay of the NLO and resummed components of the calculation. We conclude our presentation by comparing predictions from the simulation against a number of Tevatron and LHC jet-production results.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/30f7b5d792a900dc56fafb4e73a9159220b1b567

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In Nuclear and High Energy Physics

Citations in the corpus

A critical appraisal of NLO+PS matching methods (2011, methodology): “Di-jet production [5] and Z + j production [6] have now become available through the POWHEGBOX [7] and, more recently, W± plus two jets production was implemented [8] using MC@NLO methods.”
Search for narrow and broad dijet resonances in proton-proton collisions at $\sqrt{s}=$ 13 TeV and constraints on dark matter mediators and other new particles (2018, methodology): “For this prediction, we used 10 million dijet events from an NLO calculation of two jet production [51] using NNPDF3.”
Hadronic top-quark pair-production with one jet and parton showering (2011, background): “whereki denotes the momentum of the ith particle in then-th jet, see also [50].”
Parton distribution benchmarking with LHC data (2012, methodology): “7 Besides fixed-order QCD calculations, NLO event generators such as POWHEG [75] and SHERPA [76] combine the NLO hard cross section for inclusive jet production with leading-log showering evaluated by HERWIG or PYTHIA.”
Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements (2019, methodology): “The merging between the POWHEG ME calculations and the PYTHIA8 UE simulation is performed using the shower-veto procedure, which rejects showers if their transverse momentum is greater than the minimal pT of all final-state partons simulated in the ME (parameter pT hard = 2 GeV [53]).”
Standard Model Higgs boson production in association with a top anti-top pair at NLO with parton showering (2011, methodology): “Box [9], a exible computer framework implementing the POWHEG method, already used in the study of dierent processes also by other authors (among the others, the most recent applications include Ref. [10, 11, 12, 13]). In this work the following ingredients were requested and provided to POWHEG-Box a”
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, background): “One such case is that of the so-called gap fractions, which have been measured in the dilepton channel by both ATLAS (at 7 TeV [360]) and CMS (at 7 [361] and 8 TeV [362]), and compared to various theoretical predictions – MC@NLO with HERWIG6, POWHEG with both HERWIG6 and Pythia, MadGraph with Pythia”
The Structure of the Proton in the LHC Precision Era (2017, result): “Although PDF fits typically use parton–level predictions, results also exist that include the matching of NLO calculations to parton shower and hadronization [229], and which can then be directly compared with the data at hadron–level.”
NLO Higgs boson production plus one and two jets using the POWHEG BOX, MadGraph4 and MCFM (2012, background): “[38], this can be easily understood if we remember that the LHE result is suppressed by a Sudakov form factor, which requires that no harder radiation has been emitted from either the initial- or the final-state partons.”