Nuclear modification factor in intermediate-energy heavy-ion collisions
Abstract
The transverse momentum dependent nuclear modification factors (NMF), namely , is investigated for protons produced in Au + Au at 1 GeV within the framework of the isospin-dependent quantum molecular dynamics (IQMD) model. It is found that the radial collective motion during the expansion stage affects the NMF at low transverse momentum a lot. By fitting the transverse mass spectra of protons with the distribution function from the Blast-Wave model, the magnitude of radial flow can be extracted. After removing the contribution from radial flow, the can be regarded as a thermal one and is found to keep unitary at transverse momentum lower than 0.6 GeV/c and enhance at higher transverse momentum, which can be attributed to Cronin effect.
Cite
@article{arxiv.1404.4394,
title = {Nuclear modification factor in intermediate-energy heavy-ion collisions},
author = {M. Lv and Y. G. Ma and G. Q. Zhang and J. H. Chen and D. Q. Fang},
journal= {arXiv preprint arXiv:1404.4394},
year = {2014}
}
Comments
8 pages, 5 figures; aceepted by Physics Letters B