Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible experimental signatures of stable double beauty tetraquarks   A new method is proposed to search for the double beauty tetraquark
$bb\bar{u}\bar{d}$ with a mass below the $BB$ threshold. The
$b\bar{d}-\bar{b}d$ mixing can result in evolution of the tetraquark content to
$b\bar{b}\bar{u}d$ with the following strong decay into the
$\Upsilon$(1S)$\pi^-$ and $\Upsilon$(2S)$\pi^-$ final states in a secondary
vertex displaced from the primary $pp$ collision vertex. This experimental
signature is clean, has a high selection efficiency and can be well separated
from backgrounds. Experimental signatures for searches for other double heavy
tetraquarks are also discussed, suggesting the possibility of the $b\bar{d}$ or
$b\bar{s}$ mixing.

33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
1
The categories of this paper are: cs
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin