Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tetraquark interpolating fields in a lattice QCD investigation of the
  $D_{s0}^\ast(2317)$ meson   We investigate the $D_{s0}^\ast(2317)$ meson using lattice QCD and
considering correlation functions of several $\bar{c} s$ two-quark and $\bar{c}
s (\bar{u} u + \bar{d} d)$ four-quark interpolating fields. These interpolating
fields generate different structures in color, spin and position space
including quark-antiquark pairs, tetraquarks and two-meson scattering states.
For our computation we use an ensemble simulated with pion mass $m_\pi \approx
0.296 \, \textrm{GeV}$ and spatial volume of extent $2.90 \, \textrm{fm}$. We
find in addition to the expected spectrum of two-meson scattering states
another state around $60 \, \textrm{MeV}$ below the $D K$ threshold, which we
interpret as the $D_{s0}^\ast(2317)$ meson. This state couples predominantly to
a quark-antiquark interpolating field and only weakly to a $D K$ two-meson
interpolating field. The coupling to the tetraquark interpolating fields is
essentially zero, rendering a tetraquark interpretation of the
$D_{s0}^\ast(2317)$ meson rather unlikely. Moreover, we perform a scattering
analysis using L\"uscher's method and the effective range approximation to
determine the $D_{s0}^\ast(2317)$ mass for infinite spatial volume. We find
this mass $51 \, \textrm{MeV}$ below the $D K$ threshold, rather close to both
our finite volume result and the experimentally observed value.

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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: math