Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice QCD investigation of a doubly-bottom $\bar{b} \bar{b} u d$
  tetraquark with quantum numbers $I(J^P) = 0(1^+)$   We use lattice QCD to investigate the spectrum of the $\bar{b} \bar{b} u d$
four-quark system with quantum numbers $I(J^P) = 0(1^+)$. We use five different
gauge-link ensembles with $2+1$ flavors of domain-wall fermions, including one
at the physical pion mass, and treat the heavy $\bar{b}$ quark within the
framework of lattice nonrelativistic QCD. Our work improves upon previous
similar computations by considering in addition to local four-quark
interpolators also nonlocal two-meson interpolators and by performing a
L\"uscher analysis to extrapolate our results to infinite volume. We obtain a
binding energy of $(-128 \pm 24 \pm 10) \, \textrm{MeV}$, corresponding to the
mass $(10476 \pm 24 \pm 10) \, \textrm{MeV}$, which confirms the existence of a
$\bar{b} \bar{b} u d$ tetraquark that is stable with respect to the strong and
electromagnetic interactions.

12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph