FASTERD: A Monte Carlo event generator for the study of final state radiation in the process e+e-->pipigamma at DAPhiNE

Abstract FASTERD is a Monte Carlo event generator to study the final state radiation both in the e + e − → π + π − γ and e + e − → π 0 π 0 γ processes in the energy region of the ϕ -factory DAΦNE. Differential spectra that include both initial and final state radiation and the interference between them are produced. Three different mechanisms for the ππγ final state are considered: Bremsstrahlung process (both in the framework of sQED and Resonance Perturbation Theory), the ϕ direct decay ( e + e − → ϕ → ( f 0 ; f 0 + σ ) γ → π π γ ) and the double resonance mechanism (as e + e − → ϕ → ρ ± π ∓ → π + π − γ and e + e − → ρ → ω π 0 → π 0 π 0 γ ). 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/summaries/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.: 155 490 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 γ ∗ → π π γ process; test models describing Bremsstrahlung process, the Φ 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.