Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From mach cone to reappeared jet: What do we learn from PHENIX results
  on non-identified jet correlation?   High $p_T$ jets are known to be strongly modified by the dense, strongly
interacting medium created in heavy-ion collisions. The jet signal, extracted
from two particle $\Delta\phi$ correlation, shows a systematic evolution of
these modifications as function of $p_T$ and centrality. At intermediate $p_T$,
both near side and away side correlations are modified. But the modifications
are much stronger at the away side, resulting in a characteristic cone type of
structure in central Au + Au collisions. The robustness of cone structure is
strengthened by studying the jet shape as function of angle relative to the
reaction plane. As one increase the $p_T$ for BOTH hadrons, the cone structure
seems to be filled up, and a peak structure appears on the away side. However,
the interpretation of these results require careful separation of medium effect
and surface bias.

8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th