2009/10/31 by Wei-Tian Deng, Wei-tian Deng, Xin-Nian Wang · 2 citations
Mathematics · Physics and Astronomy · #DGLAP #Deep inelastic scattering #Factorization #Fragmentation (computing) #Gluon #Hadron #High-Energy Particle Collisions Research #Inelastic scattering #Jet (fluid) #Mathematics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scattering #hep-ph
paper · pdf · doi:10.1103/physrevc.81.024902
published as Phys.Rev.C81:024902,2010 · 21 pages in RevTex with 19 figures (some contents are added in this version)
openalex publication_date 2010/02/02 · arxiv created 2010/03/04 · arxiv updated 2014/11/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Within the framework of generalized factorization of higher-twist contributions to semi-inclusive cross sections of deeply inelastic scattering (DIS) off a large nucleus, multiple parton scattering leads to an effective medium-modified fragmentation function and the corresponding medium-modified DGLAP evolution equations. We extend the study to include gluon multiple scattering and induced quark-antiquark production via gluon fusion. We numerically solve these medium-modified DGLAP (mDGLAP) evolution equations and study the scale (Q2), energy (E), length (L), and jet transport parameter (\mathrmq\ifmmode \else \\fi) dependence of the modified fragmentation functions for a jet propagating in a uniform medium with finite length (a ``brick'' problem). We also discuss the concept of parton energy loss within such mDGLAP evolution equations and its connection to the modified fragmentation functions. With a realistic Wood-Saxon nuclear geometry, we calculate the modified fragmentation functions and compare them to experimental data on DIS off large nuclei. The extracted jet transport parameter at the center of a large nucleus is found to be \mathrmq\ifmmode \else \\fi0=0.024\ifmmode±\else\textpm\fi0.008 GeV2/fm.