Introduction to GR@PPA event generators for pp/ppbar collisions

Details Introduction to GR@PPA event generators for pp/ppbar collisions Introduction to GR@PPA event generators for pp/ppbar collisions

2005-01-19

arxiv.org/abs/hep-ph/0501174v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, XVIIIth International Workshop on High Energy Physics and Quantum Field Theory at St. Petersburg

Scientific paper

We have developed an extended framework, named GR@PPA, of the GRACE system for hadron collisions. The GRACE system is an automatic Feynman diagram calculation system and an event generator based on this diagram calculation. While the original GRACE system assumes that both the initial and final states are well-defined, the GR@PPA framework applies that the initial and final states parton configuration is treated in the Feynman diagram calculation at the same time by putting one more integration variables. As a result, some subprocesses with the same coupling order in hadron-hadron collisions can share an identical "GRACE output code" and can be treated as a single subprocess. This technique simplifies the program code and saves the computing time very much. The constructed event generators would be suitable for the large scale Monte Carlo production in the hadron colliders. In this paper, we discuss this technique, and present some results and performances.

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