Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear modification factors for jet fragmentation   Using a recently-developed perturbative-QCD approach for jet evolution in a
dense quark-gluon plasma, we study the nuclear modification factor for the jet
fragmentation function. The qualitative behaviour that we find is in agreement
with the respective experimental observations in Pb+Pb collisions at the LHC: a
pronounced nuclear enhancement at both ends of the spectrum. Our Monte Carlo
simulations are supplemented with analytic estimates which clarify the physical
interpretation of the results. The main source of theoretical uncertainty is
the sensitivity of our calculations to a low-momentum cutoff which mimics
confinement. To reduce this sensitivity, we propose a new observable, which
describes the jet fragmentation into subjets and is infrared-and-collinear safe
by construction. We present Monte Carlo predictions for the associated nuclear
modification factor together with their physical interpretation.

34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th