Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice study of exotic S=+1 baryon   We propose S=+1 baryon interpolating operators, which are based on an exotic
description of the antidecuplet baryon like diquark-diqaurk-antiquark. By using
one of the new operators, the mass spectrum of the spin-1/2 pentaquark states
is calculated in quenched lattice QCD at $\beta=6/g^2=6.2$ on a $32^3\times48$
lattice. It is found that the $J^P$ assignment of the lowest $\Theta(uudd \bar
s)$ state is most likely $(1/2)^-$. We also calculate the mass of the charm
analog of the $\Theta$ and find that the $\Theta_c(uudd \bar c)$ state lies
much higher than the $DN$ threshold, in contrast to several model predictions.

30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics