Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jet transport coefficient $\hat{q}$ in lattice QCD   We present the first calculation of the jet transport coefficient $\hat{q}$
in quenched and (2+1)-flavor QCD on a 4-D Euclidean lattice. The light-like
propagation of an energetic parton is factorized from the mean square gain in
momentum transverse to the direction of propagation, which is expressed in
terms of the thermal field-strength field-strength correlator. The
leading-twist term in its operator product expansion is calculated on the
lattice. Continuum extrapolated quenched results, and full QCD estimates based
on un-renormalized lattice data, over multiple lattice sizes, are compared with
(non) perturbative calculations and phenomenological extractions of $\hat{q}$.
The lattice data for $\hat{q}$ show a temperature dependence similar to the
entropy density. Within uncertainties, these are consistent with
phenomenological extractions, contrary to calculations using perturbation
theory.

20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int