FASTERD: A Monte Carlo event generator for the study of final state radiation in the process e(+)e(-) -> pi pi gamma at DA Phi NE
FASTERD is a Monte Carlo event generator to study the final state radiation both in the e(+)e(-) pi(+)pi(-)gamma and e(+)e(-) -> pi(0)pi(0 gamma) processes in the energy region of the phi-factory DA Phi NE. Differential spectra that include both initial and final state radiation and the interference between them are produced. Three different mechanisms for the pi pi gamma final state are considered: Bremsstrahlung process (both in the framework of sQED and Resonance Perturbation Theory), the phi direct decay (e(+)e(-) -> phi -> (f(0): f(0) + sigma)gamma -> pi pi gamma) and the double resonance mechanism (as e(+)e(-) -> phi -> rho(+/-)pi(-/+) -> pi(+)pi(-)gamma and e(+)e(-) -> rho -> omega pi(0) -> pi(0)pi(0)gamma). Additional models can be incorporated as well. Program summary Program title: FASTERD Catalogue identifier: AEDC_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/sumniaries/AEDC_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast. N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 4505 No. of bytes in distributed program, including test data, etc.: 155490 Distribution format: tar.gz Programming language: FORTRAN77 Computer: any Computer with FORTRAN77 compiler Operating system: UNIX, LINUX, MAC OSX Classification: 11.1 External routines: MATHLIB, PACKLIB from CERN library (http://cernlib.web.cern.ch/cernlib/) Nature of problem: General parameterization of the gamma* -> pi pi gamma process: test models describing Bremsstrahlung process, the Phi direct decay, double vector resonance mechanism. Solution method: Numerical integration of analytical formulae. Restrictions: Only one photon emission is considered. Running time: 28 sec with standard input card (1e6 events generated) on an Intel Core 2 Duo 2 GHz with 1 GB RAM. (C) 2009 Elsevier B.V. All rights reserved.
quantum electrodynamics (qed) e(+)e(-)-annihilation hadronic cross section radiative corrections low energy photon-pion interaction model