Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decay modes of the scalar exotic meson
  $T_{bs;\overline{u}\overline{d}}^{-}$   We investigate the semileptonic decay of the scalar tetraquark $T_{bs;
\overline{u}\overline{d}}^{-}$ to final state $T_{cs;\overline{u}\overline{d}
}^{0} l \overline{\nu}_l$, which proceeds due to the weak transition $b \to c l
\overline{\nu}_l$. For these purposes, we calculate the spectroscopic
parameters of the final-state scalar tetraquark $T_{cs;\overline{u}\overline{
d}}^{0}$. In calculations we use the QCD sum rule method by taking into account
the quark, gluon, and mixed condensates up to dimension 10. The mass of the
$T_{cs;\overline{u}\overline{d}}^{0}$ obtained in the present work $( 2878 \pm
128 )~\mathrm{MeV}$ indicates that it is unstable against the strong
interactions, and can decay to the mesons $D^{0}\overline{K}^{0}$ and
$D^{+}K^{-}$. Partial widths of these $S$-wave modes as well as the full width
of the tetraquark $T_{cs;\overline{u}\overline{d}}^{0}$ are found by means of
the QCD light-cone sum rule method and technical tools of the soft-meson
approximation. The partial widths of the main semileptonic processes
$T_{bs;\overline{u}\overline{d}}^{-} \to T_{cs;\overline{u}
\overline{d}}^{0}l\overline{\nu}_l$, $l=e, \mu$, and $\tau$ are computed by
employing the weak form factors $G_{1}(q^2)$ and $G_{2}(q^2)$, which are
extracted from the QCD three-point sum rules. We also trace back the weak
transformations of the stable tetraquark $T_{bb;\overline{u}\overline{d} }^{-}
$ to conventional mesons. The obtained results for the full width $
\Gamma_{\mathrm{full}}=(3.28\pm 0.60) \times 10^{-10}~\mathrm{MeV} $ and mean
lifetime $\tau=2.01_{-0.31}^{+0.44}~\mathrm{ps}$ of $T_{bs;\overline{u}
\overline{d}}^{-}$, as well as predictions for decay channels of the tetraquark
$T_{bb;\overline{u}\overline{d}}^{-}$ can be used in experimental studies of
these exotic states. \end{abstract}

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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: cs
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The categories of this paper are: quant-ph