Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Including heavy spin effects in the prediction of a $\bar{b} \bar{b} u
  d$ tetraquark with lattice QCD potentials   We investigate spin effects in four-quark systems consisting of two heavy
anti-bottom quarks and two light up/down quarks. To this end we use the
Born-Oppenheimer approximation. We utilize potentials of two static antiquarks
in the presence of two quarks of finite mass computed via lattice QCD and solve
a coupled-channel Schr\"odinger equation for the anti-bottom-anti-bottom
separation. Without taking heavy quark spins into account this approach
predicted a $u d \bar b \bar b$ tetraquark bound state with quantum numbers
$I(J^P) = 0(1^+)$. We now extend this Born-Oppenheimer approach with coupled
channel Schr\"odinger equations allowing us to incorporate effects due to the
heavy $\bar b$ spins. We confirm the existence of the $u d \bar b \bar b$
tetraquark.

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The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
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The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
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The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an