GR@PPA 2.8: initial-state jet matching for weak boson production processes at hadron collisions

Abstract

The initial-state jet matching method introduced in our previous studies has been applied to the event generation of single $W$ and $Z$ production processes and diboson ($W^{+}{W}^{-}$, $WZ$ and $ZZ$) production processes at hadron collisions in the framework of the GR@PPA event generator. The generated events reproduce the transverse momentum spectra of weak bosons continuously in the entire kinematical region. The matrix elements (ME) for hard interactions are still at the tree level. As in previous versions, the decays of weak bosons are included in the matrix elements. Therefore, spin correlations and phase-space effects in the decay of weak bosons are exact at the tree level. The program package includes custom-made parton shower programs as well as ME-based hard interaction generators in order to achieve self-consistent jet matching. The generated events can be passed to general-purpose event generators to make the simulation proceed down to the hadron level.

29 pages, 14 figures; minor changes to clarify the discussions, and corrections of typos

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• Event generation with SHERPA 1.1
• ROOT - A C++ Framework for Petabyte Data Storage, Statistical Analysis and Visualization
• Parton Distributions for LO Generators
• Measurement of the shape of the boson transverse momentum distribution in ppbar -> Z/gamma* -> ee+X events produced at sqrt{s}=1.96 TeV
• GR@PPA 2.7 event generator for $pp$/$p\bar{p}$ collisions
• Initial-state parton shower kinematics for NLO event generators

Cited by in corpus (9)

• Consistent simulation of non-resonant diphoton production at hadron collisions with a custom-made parton shower
• Higher-Order Corrections in QCD Evolution Equations and Tools for Their Calculation
• 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
• Consistent simulation of non-resonant diphoton production in hadron collisions including associated jet production up to two jets
• Simulation of $Z$-boson $p_T$ spectrum at LHC and Tevatron using GR@PPA
• Precise simulation of the initial-state QCD activity associated with $Z$-boson production in hadron collisions
• Computational Particle Physics for Event Generators and Data Analysis
• GR@PPA 2.9: radiation matching for simulating photon production processes in hadron collisions