Hard photon and neutral pion production in cold nuclear matter
Nuclear Experiment
2016-08-16 v1
Abstract
The production of hard photons and neutral pions in 190 MeV proton induced reactions on C, Ca, Ni, and W targets has been for the first time concurrently studied. Angular distributions and energy spectra up to the kinematical limit are discussed and the production cross-sections are presented. From the target mass dependence of the cross-sections the propagation of pions through nuclear matter is analyzed and the production mechanisms of hard photons and primordial pions are derived. It is found that the production of subthreshold particles proceeds mainly through first chance nucleon-nucleon collisions. For the most energetic particles the mass scaling evidences the effect of multiple collisions.
Keywords
Cite
@article{arxiv.nucl-ex/0109005,
title = {Hard photon and neutral pion production in cold nuclear matter},
author = {L. Aphecetche and J. Bacelar and H. Delagrange and D. d'Enterria and M. Hoefman and H. Huisman and N. Kalantar-Nayestanaki and H. Löhner and G. Martínez and T. Matulewicz and J. Messchendorp and M. -J. Mora and R. Ostendorf and S. Schadmand and Y. Schutz and M. Seip and A. Taranenko and R. Turrisi and M. -J. Van Goethem and M. Volkerts and V. Wagner and H. W. Wilschut},
journal= {arXiv preprint arXiv:nucl-ex/0109005},
year = {2016}
}
Comments
submitted to Phys. Lett. B