The in-medium scale evolution in jet modification

Details The in-medium scale evolution in jet modification The in-medium scale evolution in jet modification

2009-01-28

arxiv.org/abs/0901.4516v2

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures, Revtex, references added, typos corrected, improved calculation

Scientific paper

The in-medium modification of the scale dependence of the fragmentation function in dense matter, brought about by higher twist corrections to the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations, is derived. A phenomenologically motivated resummation is outlined which incorporates the next-to-leading twist single gluon emission kernel along with the vacuum emission kernel and provides an in-medium virtuality evolution of the final fragmentation function of a hard jet propagating through dense matter. The concept of a fragmentation function is generalized to include a dependence on distance traveled in the medium. Following this, numerical implementations are carried out and compared to experimental results on the single inclusive suppression observed in Deep-Inelastic scattering (DIS) off a large nucleus.

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