Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity
  Distributions in Au+Au Collisions at $\sqrt{s_{\rm NN}}=$ 27, 54.4, and 200
  GeV at RHIC   According to first principle Lattice QCD calculations, the transition from
quark-gluon plasma to hadronic matter is a smooth crossover in the region
$\mu_{\rm B}\leq T_{c}$. In this range the ratio, $C_{6}/C_{2}$, of net-baryon
distributions are predicted to be negative. In this paper, we report the first
measurement of the midrapidity net-proton $C_{6}/C_{2}$ from 27, 54.4 and 200
GeV Au+Au collisions at RHIC. The dependence on collision centrality and
kinematic acceptance in ($p_{T}$, $y$) are analyzed. While for 27 and 54.4 GeV
collisions the $C_{6}/C_{2}$ values are close to zero within uncertainties, it
is observed that for 200 GeV collisions, the $C_{6}/C_{2}$ ratio becomes
progressively negative from peripheral to central collisions. Transport model
calculations without critical dynamics predict mostly positive values except
for the most central collisions within uncertainties. These observations seem
to favor a smooth crossover in the high energy nuclear collisions at top RHIC
energy.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc