Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Results for the mass difference between the long- and short- lived K
  mesons for physical quark masses   The two neutral kaon states in nature, the $K_L$ (long-lived) and $K_S$
(short-lived) mesons, are the two time-evolution eigenstates of the $K^0 -
\overline{K^0}$ mixing system. The prediction of their mass difference $\Delta
m_K$ based on the Standard Model is an important goal of lattice QCD. In this
article, I will present preliminary results from a calculation of $\Delta m_K$
performed on an ensemble of $64^3 \times 128$ gauge configurations with inverse
lattice spacing of 2.36 GeV and physical quark masses. These new results come
from 2.5 times the Monte Carlo statistics used for the result presented in last
year's conference. Further discussion of the methods employed and the resulting
systematic errors will be given.

22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci