Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse momentum structure of pair correlations as a signature of
  collective behavior in small collision systems   We perform 3+1D viscous hydrodynamic calculations of proton-lead and
lead-lead collisions at top LHC energy. We show that existing data from
high-multiplicity p-Pb events can be well described in hydrodynamics,
suggesting that collective flow is plausible as a correct description of these
collisions. However, a more stringent test of the presence of hydrodynamic
behavior can be made by studying the detailed momentum dependence of
two-particle correlations. We define a relevant observable, $r_n$, and make
predictions for its value and centrality dependence if hydrodynamics is a valid
description. This will provide a non-trivial confirmation of the nature of the
correlations seen in small collision systems, and potentially to determine
where the hydrodynamic description, if valid anywhere, stops being valid.
Lastly, we probe what can be learned from this observable, finding that it is
insensitive to viscosity, but sensitive to aspects of the initial state of the
system that other observables are insensitive to, such as the transverse length
scale of the fluctuations in the initial stages of the collision.

18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat