Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exploring the nature of chiral phase transition in two-flavor QCD using
  extra heavy quarks   Chiral phase transition of two flavor QCD at finite quark masses is known to
be crossover except near the chiral limit, but it can turn to a first order
transition when adding many extra flavors. This property is used to explore the
nature of the phase transition of massless two flavor QCD using lattice
numerical simulations. The extra heavy flavors being incorporated in the form
of the hopping parameter expansion through the reweighting, the number of the
extra flavors and their masses appear only in a single parameter, defined by
$h$. We determine the critical value of the parameter, at which the first order
and the crossover regions are separated, and examine its dependence on the two
flavor mass. The lattice calculations are carried out at $N_t$=4, and show that
the critical value does not depend on the two flavor mass in the range we have
studied ($0.46 \le m_\pi/m_\rho \le 0.66$) and appears to remain finite and
positive in the chiral limit, suggesting that the phase transition of massless
two flavor QCD is of second order.

10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga