GR@PPA 2.7 event generator for $pp$/$p\bar{p}$ collisions

Abstract

The GR@PPA event generator has been updated to version 2.7. This distribution provides event generators for $V$ ($W$ or $Z$) + jets ($\le$ 4 jets), $VV$ + jets ($\le$ 2 jets) and QCD multi-jet ($\le$ 4 jets) production processes at $pp$ and $p\bar{p}$ collisions, in addition to the four bottom quark productions implemented in our previous work (GR@PPA\_4b). Also included are the top-pair and top-pair + jet production processes, where the correlation between the decay products are fully reproduced at the tree level. Namely, processes up to seven-body productions can be simulated, based on ordinary Feynman diagram calculations at the tree level. In this version, the GR@PPA framework and the process dependent matrix-element routines are separately provided. This makes it easier to add further new processes, and allows users to make a choice of processes to implement. This version also has several new features to handle complicated multi-body production processes. A systematic way to combine many subprocesses to a single base-subprocess has been introduced, and a new method has been adopted to calculate the color factors of complicated QCD processes. They speed up the calculation significantly.

21 pages, no figure

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Cited by in corpus (18)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• PHANTOM: a Monte Carlo event generator for six parton final states at high energy colliders
• Top quark physics at the LHC
• Search for Third Generation Vector Leptoquarks in p anti-p Collisions at sqrt(s) = 1.96 TeV
• 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
• QCD parity violation at LHC in warped extra dimension
• Consistent simulation of direct-photon production in hadron collisions including associated two-jet production
• ME-PS matching in the simulation of multi-jet production in hadron collisions using a subtraction method
• Test of CDF dijet anomaly within the standard model
• Precise simulation of the initial-state QCD activity associated with $Z$-boson production in hadron collisions
• Parity Violation in QCD Process
• Markovian MC simulation of QCD evolution at NLO level with minimum k_T
• The new PV prescription for IR singularities of NLO splitting functions
• A consistent event generation for non-resonant diphoton production at hadron collisions
• GR@PPA Event Generator