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arXiv · 2004.00027

Extracting the jet transport coefficient of cold nuclear matter from world data

Peng Ru·Zhong-Bo Kang·Enke Wang·Hongxi Xing·Ben-Wei Zhang
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Abstract

We present the first global extraction of the jet transport coefficient ($\hat q$) for cold nuclear matter within the framework of higher-twist expansion. The analysis takes into account the world data on transverse momentum broadening in semi-inclusive $e$-A deep inelastic scattering (DIS) and in Drell-Yan dilepton and heavy quarkonium production in $p$-A collisions, as well as the nuclear modification of the structure functions in DIS. The results of this work provide the first quantitative evidence for the universality and non-trivial scale dependence of the medium transport property, similar to that for nucleon structure as encoded in the standard parton distribution functions. We expect the extracted scale dependence of $\hat q$ for cold nuclear matter can be extended to precisely identify the fundamental property of quark gluon plasma.

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Peng Ru, Zhong-Bo Kang, Enke Wang, Hongxi Xing, Ben-Wei Zhang. 2020-03-31. Extracting the jet transport coefficient of cold nuclear matter from world data. https://doi.org/10.1016/j.nuclphysa.2020.121798

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