Monte-Carlo simulations of photohadronic processes in astrophysics

Details Monte-Carlo simulations of photohadronic processes in astrophysics Monte-Carlo simulations of photohadronic processes in astrophysics

1999-03-31

arxiv.org/abs/astro-ph/9903478v1

Comput.Phys.Commun.124:290-314,2000

Astronomy and Astrophysics

Astrophysics

39 pages, 17 figures, submitted to Comp.Phys.Com

Scientific paper

10.1016/S0010-4655(99)00446-4

A new Monte Carlo program for photohadronic interactions of relativistic nucleons with an ambient photon radiation field is presented. The event generator is designed to fulfil typical astrophysical requirements, but can also be used for radiation and background studies at high energy colliders such as LEP2 and HERA, as well as for simulations of photon induced air showers. We consider the full photopion production cross section from the pion production threshold up to high energies. It includes resonance excitation and decay, direct single pion production and diffractive and non-diffractive multiparticle production. The cross section of each individual process is calculated by fitting experimental data, while the kinematics is determined by the underlying particle production process. We demonstrate that our model is capable of reproducing known accelerator data over a wide energy range.

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