GR@PPA Event Generator

Abstract

The history and the present status of the GR@PPA event generator are briefly reviewed. The development of GR@PPA started in 2000 in order to provide a framework of NLO event generators for hadron collision interactions. After the first release of the package (GR@PPA\_4b) in 2002, which supported four bottom quark production processes, many multi-particle production processes have been added to the package: GR@PPA\_ALL in 2004 and GR@PPA 2.7 in 2006. Now we are going to release a new package (GR@PPA 2.8), which supports single and double weak-boson production processes with an initial-state jet matching. Though the matrix elements presently included are still at the tree level, this new release is an important step towards constructing consistent NLO event generators.

Talk presented at the 3rd Computational Particle Physics Workshop (CPP2010), September 23-25, 2010, KEK, Tsukuba, Japan; submitted to Proceedings of Science. 7 pages, 3 figures

References in corpus (3)

• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• Event generation with SHERPA 1.1
• GR@PPA 2.7 event generator for $pp$/$p\bar{p}$ collisions