EtabFDC: An ηbηb event generator in hadroproduction at LHC

The EtabFDC is a matrix-element event generator package for ηbηb hadroproduction at LHC. It generates pp→ηbXpp→ηbX events for all possible parton-level 2→22→2 leading-order processes with three commonly used ηbηb decay channels being implemented. The Pythia interface is used for parton-shower and hadronization to obtain the hadronic events. The FORTRAN codes of this package are generated by FDC (Feynman Diagram Calculation) system automatically.Program summaryProgram title: EtabFDC (Version 1.01)Catalogue identifier: AEBV_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEBV_v1_0.htmlProgram obtainable from: CPC Program Library, Queen's University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 1 840 204No. of bytes in distributed program, including test data, etc.: 18 018 379Distribution format: tar.gzProgramming language: FORTRAN 77Computer: Any computer with Linux operating system and GNU 77 Fortran compilerOperating system: Linux (with GNU FORTRAN 77 compiler)Classification: 11.1External routines: CERNLIB 2001 (or CERNLIB 2003)Nature of problem:   This package generates pp→ηbXpp→ηbX events for partonic 2 →2 tree-level processes with implementing three ηbηb decay channels. It then interfaces with PYTHIA for parton-shower and hadronization to obtain the hadronic events.Solution method: The FORTRAN codes of this package are generated by FDC system [1] automatically.Additional comments: This program could not be tested by the CPC Program Library as it requires the CERNLIB libraries.Running time:   To generate 1000 events on a 3.2G Intel-P4 CPU platform (with hyper-technology), it will take approximate 20, 30 and 300 seconds for decay channel ηb→J/ψγ,ηb→J/ψJ/ψηb→J/ψγ,ηb→J/ψJ/ψ and ηb→J/ψccbarηb→J/ψccbar, respectively.References:[1] J.X. Wang, Nucl. Instrum. Methods A 534 (2004) 241, arXiv:hep-ph/0407058.