Modified DGLAP evolution for fragmentation functions in nuclei and QGP

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• 作者：Wei-Tian Deng^b ; ^a ; Ning-Bo Chang^a ; Xin-Nian Wang^c
• 关键词：Modified splitting functions ; Modified Fragmentation Functions ; nuclear modification factor
• 刊名：Nuclear Physics A
• 出版年：2011
• 出版时间：1 April 2011
• 年：2011
• 卷：855
• 期：1
• 页码：416-419
• 全文大小：169 K

文摘

Within the framework of generalized factorization of higher-twist contributions, including modification to splitting functions of both quark and gluon, we get and numerically resolve the medium-modified DGLAP (mDGLAP) evolution equations. With Woods-Saxon nuclear geometry and Hirano 3D ideal hydrodynamic simulations of hot medium, we study the medium modified fragmentation functions (mFF) in DIS and Au+Au collisions in RHIC. Our calculations imply that the parton density in the hot medium produced in RHIC is about 30 times larger than in a cold nucleus.