Panero, Marco and Rummukainen, Kari and Schafer, Andreas (2014) Lattice Study of the Jet Quenching Parameter. PHYSICAL REVIEW LETTERS, 112 (16): 162001. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We present a first-principle computation of the jet quenching parameter, which describes the momentum broadening of a high-energy parton moving through the deconfined state of QCD matter at high temperature. Following an idea originally proposed by Caron-Huot, we explain how one can evaluate the soft contribution to the collision kernel characterizing this real-time phenomenon, analyzing certain gauge-invariant operators in a dimensionally reduced effective theory (electrostatic QCD), which can be studied nonperturbatively via simulations on a Euclidean lattice. Our high-precision numerical computations at two different temperatures indicate that soft contributions to the jet quenching parameter are large. After discussing the systematic uncertainties involved, we present a quantitative estimate for the jet quenching parameter in the temperature range accessible at heavy-ion colliders, and compare it to results from phenomenological models as well as to strong-coupling computations based on the holographic correspondence.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUCLEUS-NUCLEUS COLLISIONS; HIGH-TEMPERATURE; GAUGE-THEORY; LARGE N; STRING THEORY; ENERGY; QCD; SUPPRESSION; MOMENTUM; |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Nov 2019 15:11 |
| Last Modified: | 13 Nov 2019 15:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10291 |
Actions (login required)
 |
View Item |
