GaGaRes: A Monte Carlo generator for resonance production in two-photon physics

Published: 15-03-2002| Version 1 | DOI: 10.17632/33ggxv6sr5.1
F.A. Berends,
R. van Gulik


Abstract In this paper a Monte Carlo generator, GaGaRes, is presented which can be used to describe two-photon resonance production in e^+ e^-collisions. The program can generate the five lowest-lying C = +1 meson states of any qq̄ combination together with the outgoing electron and positron. The dependence on the photon virtualities Q_1^2and Q_2^2is fully taken into account. The program also generates the density matrices of the resonance, which form an essential tool in the description of ... Title of program: GaGaRes Catalogue Id: ADPO_v1_0 Nature of problem With the advent of LEP2 higher energies for two-photon reactions became available with high luminosities. This makes it possible to search experimentally for heavier resonances created in two-photon collisions and also to determine the dependence of the two-photon cross sections on the virtualities Q1^2 and Q2^2. Moreover, the decay distributions of the resonances can be studied. These experimental possibilities make it desirable to have a program, which can simulate events as expected from our ... Versions of this program held in the CPC repository in Mendeley Data ADPO_v1_0; GaGaRes; 10.1016/S0010-4655(01)00466-0 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)