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Radiative pT-broadening of high-energy quarks and gluons in QCD matter
- Publication Year :
- 2013
- Publisher :
- arXiv, 2013.
-
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.<br />Comment: 24 pages, 13 figures. v2: typos corrected, discussion extended
- Subjects :
- Quark
Physics
Nuclear and High Energy Physics
Energy loss
Particle physics
Nuclear Theory
Logarithm
FOS: Physical sciences
Gluon
Nuclear Theory (nucl-th)
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
Quantum electrodynamics
Quark–gluon plasma
Radiative transfer
Resummation
QCD matter
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....e4fb95a3dfe96af8643e900f59983489
- Full Text :
- https://doi.org/10.48550/arxiv.1304.7677