Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] adrh_v1_0.tar.gz(384 Kbytes)|
|Manuscript Title: GR@PPA_4b: a four bottom quark production event generator for pp/ppbar collisions.|
|Authors: S. Tsuno, K. Sato, T. Abe, J. Fujimoto, T. Ishikawa, Y. Kurihara, S. Odaka, Y. Takaiwa|
|Program title: GR@PPA_4b (v1.0)|
|Catalogue identifier: ADRH_v1_0|
Distribution format: tar.gz
|Journal reference: Comput. Phys. Commun. 151(2003)216|
|Programming language: Fortran.|
|Operating system: UNIX.|
|RAM: 56.5K words|
|Keywords: GR@PPA, GRACE, PYTHIA, Higgs, Bottom quark, pp/ppbar collisions, Elementary particle physics, Event simulation.|
|ACTU_v2_0||PYTHIA V6.154||CPC 135(2001)238|
Nature of problem:
Four bottom-quark production is an important channel for the study of Higgs-boson properties at future high energy hadron-collider experiments. However, the detectability is very ambiguous because only crude estimates based on many approximations have been available for background processes.
GR@PPA_4b calculates the cross section and generates unweighted events of four bottom-quark production in pp/ppbar collisions, on the basis of exact matrix elements of all the possible processes at the tree level within the Standard Model. QCD processes as well as the Higgs boson and gamma/Z mediated processes are included. The program has been developed within the framework of GR@PPA, and extension of the GRACE system to hadron collisions, and embedded in PYTHIA. CERNLIB libraries are used.
The Yukawa couplings of lighter quarks (u, d, s and c) are ignored. The bottom-quark content in the beam hadrons is not taken into account.
2 hours for a cross-section integration and 200 msec per 1 event for an event generation.
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