Particle emission from 40Ar nuclei excited in fixed-target 208Pb+40Ar UPC at the LHC
P. Jucha, M. Klusek-Gawenda, K. Mazurek, L. L. Pappalardo, K. Pysz, A. Szczurek
Abstract
Ultraperipheral collisions of heavy ions, dominated by the electromagnetic interaction, allow to investigate the photoproduction of baryons and mesons from the excited nuclei. At LHCb, thanks to the SMOG2 system, these studies can also be conducted in fixed-target collisions, exploiting a variety of target gases ranging from 4He to Xe. In the present work, we adapted our photonuclear model and the Giesen-Boltzmann-Uehling-Uhlenbeck (GiBUU) generator to study photoproduction of protons, neutrons as well as pions and kaons from excited 40Ar nuclei in fixed-target ultraperipheral collisions with the LHC 208Pb beam. We present predictions for the total and differential photoproduction cross sections in p and pT, both in the full phase-space and within the geometrical acceptance of the LHCb detector.
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