QCD event generators with next-to-leading order matrix-elements and parton showers

Abstract

A new method to construct event-generators based on next-to-leading order QCD matrix-elements and leading-logarithmic parton showers is proposed. Matrix elements of loop diagram as well as those of a tree level can be generated using an automatic system. A soft/collinear singularity is treated using a leading-log subtraction method. Higher order re-summation of the soft/collinear correction by the parton shower method is combined with the NLO matrix-element without any double-counting in this method. An example of the event generator for Drell-Yan process is given for demonstrating a validity of this method.

18 pages, 6 figures, version 2: update reference [13]

References in corpus (5)

• Matching NLO QCD computations and parton shower simulations
• MRST2001: partons and alpha_S from precise deep inelastic scattering and Tevatron jet data
• The two cutoff phase space slicing method
• Incorporating next-to-leading order matrix elements for hadronic diboson production in showering event generators
• Combining Parton Showers with Next-to-Leading Order QCD Matrix Elements in Deep-Inelastic eP Scattering

Cited by in corpus (32)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Merging meets matching in MC@NLO
• Hard Interactions of Quarks and Gluons: a Primer for LHC Physics
• On-Shell Methods in Perturbative QCD
• Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA
• A proposal for a standard interface between Monte Carlo tools and one-loop programs
• S@M, a Mathematica Implementation of the Spinor-Helicity Formalism
• Collinear and TMD Quark and Gluon Densities from Parton Branching Solution of QCD Evolution Equations
• Parton showers from the dipole formalism
• Full order alpha electroweak corrections to double Higgs-strahlung at the linear collider
• Next-to-leading order QCD calculations with parton showers I: collinear singularities
• GR@PPA 2.7 event generator for $pp$/$p\bar{p}$ collisions
• Next-to-leading order QCD jet production with parton showers and hadronization
• Numerical Contour Integration for Loop Integrals
• Next-to-leading order QCD calculations with parton showers II: soft singularities
• Initial-state parton shower kinematics for NLO event generators
• Markovian Monte Carlo program EvolFMC v.2 for solving QCD evolution equations
• GR@PPA 2.8: initial-state jet matching for weak boson production processes at hadron collisions
• Simulation of $Z$ boson $p_T$ spectrum at Tevatron by leading-order event generators
• Consistent simulation of non-resonant diphoton production at hadron collisions with a custom-made parton shower
• Consistent simulation of direct-photon production in hadron collisions including associated two-jet production
• Consistent simulation of non-resonant diphoton production in hadron collisions including associated jet production up to two jets
• ME-PS matching in the simulation of multi-jet production in hadron collisions using a subtraction method
• Collinear and TMD distributions with dynamical soft-gluon resolution scale
• Precise simulation of the initial-state QCD activity associated with $Z$-boson production in hadron collisions
• Markovian MC simulation of QCD evolution at NLO level with minimum k_T
• GR@PPA 2.9: radiation matching for simulating photon production processes in hadron collisions