Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation
High Energy Physics - Phenomenology
2014-11-17 v1 Nuclear Theory
Abstract
Multiple parton scattering and induced parton energy loss in deeply inelastic scattering (DIS) off heavy nuclei is studied within the framework of generalized factorization in perturbative QCD with a complete calculation beyond the helicity amplitude (or soft bremsstrahlung) approximation. Such a calculation gives rise to new corrections to the modified quark fragmentation functions. The effective parton energy loss is found to be reduced by a factor of 5/6 from the result of helicity amplitude approximation.
Cite
@article{arxiv.hep-ph/0301195,
title = {Multiple Parton Scattering in Nuclei: Beyond Helicity Amplitude Approximation},
author = {Ben-Wei Zhang and Xin-Nian Wang},
journal= {arXiv preprint arXiv:hep-ph/0301195},
year = {2014}
}
Comments
20 pages, 14 figures