STARlight: A Monte Carlo Simulation Program for ultra-peripheral collisions of relativistic ions

Published: 19-11-2016| Version 1 | DOI: 10.17632/xjpf4rxtbj.1
Spencer R. Klein,
Joakim Nystrand,
Janet Seger,
Yuri Gorbunov,
Joey Butterworth


Ultra-peripheral collisions (UPCs) have been a significant source of study at RHIC and the LHC. In these collisions, the two colliding nuclei interact electromagnetically, via two-photon or photonuclear interactions, but not hadronically; they effectively miss each other. Photonuclear interactions produce vector meson states or more general photonuclear final states, while two-photon interactions can produce lepton or meson pairs, or single mesons. In these interactions, the collision geometry plays a major role. We present a program, STARlight, that calculates the cross-sections for a variety of UPC final states and also creates, via Monte Carlo simulation, events for use in determining detector efficiency.