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High Energy Physics - Phenomenology

arXiv:1304.7677 (hep-ph)
[Submitted on 29 Apr 2013 (v1), last revised 4 Sep 2013 (this version, v2)]

Title:Radiative pT-broadening of high-energy quarks and gluons in QCD matter

Authors:Tseh Liou, A.H. Mueller, Bin Wu
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Abstract:We study radiative $p_{\perp}$-broadening of high energy quarks passing through hot and cold QCD matter. With $L$ the length of the matter and $l_{0}$ the size of constituents of the matter we find $\avg{p_{\perp}^{2}}$ has both double logarithmic terms, $\ln^{2}(L/l_{0})$, and single logarithmic terms, $\ln(L/l_{0})$, coming from gluon radiation induced by the matter. We use a (slight) extension of a formalism developed by B. Zakharov for studying energy loss, a formalism which, for much of our calculation, reduces to a simple dipole scattering analysis. We estimate the radiative contribution to be a sizable correction to the nonradiative value of $\avg{p_{\perp}^{2}}$. We also carry out a resummation of the double logarithmic terms that we find, and we briefly discuss running coupling effects which appear here in a rather unusual way.
Comments: 24 pages, 13 figures. v2: typos corrected, discussion extended
Subjects: High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Cite as: arXiv:1304.7677 [hep-ph]
  (or arXiv:1304.7677v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1304.7677
Journal reference: Nucl.Phys. A916 (2013) 102-125
Related DOI: https://doi.org/10.1016/j.nuclphysa.2013.08.005

Submission history

From: Tseh Liou [view email]
[v1] Mon, 29 Apr 2013 14:55:49 UTC (715 KB)
[v2] Wed, 4 Sep 2013 15:38:14 UTC (716 KB)
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