Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jet fragmentation function in heavy-ion collisions   We study the fragmentation function of jets propagating through a dense
quark-gluon plasma within perturbative QCD. Our results for its nuclear
modification factor are in qualitative agreement with the experimental data in
Pb+Pb collisions at the LHC. In particular, we reproduce the enhancements seen
in the data at both relatively soft and relatively large transverse momenta,
with clear physical interpretations. The perturbative predictions however are
quite sensitive to the value of the infrared cutoff mimicking the confinement
scale, due to the fact that the fragmentation function is not an infrared safe
quantity. To remedy this, we propose a new observable -- the (primary) subjet
fragmentation function -- which is infrared safe and has features similar to
the fragmentation function. We provide predictions for this observable in the
vacuum and in heavy-ion collisions that could be tested against the
experimental data.

18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex