1 Ocak 2020 Dergi makalesi Açık Erişim

Agaev, S. S.; Azizi, K.; Sundu, H.

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  <dc:creator>Agaev, S. S.</dc:creator>
  <dc:creator>Azizi, K.</dc:creator>
  <dc:creator>Sundu, H.</dc:creator>
  <dc:date>2020-01-01</dc:date>
  <dc:description>Spectroscopic parameters and decay channels of the vector resonance $Y\left(2175\right)$ are studied by considering it as a diquark-antidiquark state with the quark content $su\overline{s}\overline{u}$. The mass and coupling of the tetraquark $Y\left(2175\right)$ are calculated using the QCD two-point sum rules by taking into account various quark, gluon and mixed condensates up to dimension 15. Partial widths of its strong decays to $\varphi {f}_{0}\left(980\right)$, $\varphi \eta $, and $\varphi {\eta }^{\prime }$ are computed as well. To this end, we explore the vertices $Y\varphi {f}_{0}\left(980\right)$, $Y\varphi \eta $, and $Y\varphi {\eta }^{\prime }$, and calculate the corresponding strong couplings by means of the QCD light-cone sum rule method. The coupling ${G}_{Y\varphi f}$ of the vertex $Y\varphi {f}_{0}\left(980\right)$ is found using the full version of this method, and by treating the scalar meson ${f}_{0}\left(980\right)$ as a diquark-antidiquark tetraquark state. The couplings ${g}_{Y\varphi \eta }$ and ${g}_{Y\varphi {\eta }^{\prime }}$, however, are calculated by applying the soft-meson approximation to the light-cone sum rule method. Prediction for the mass of the resonance ${m}_{Y}=\left(2173±85\right)\text{}\text{}\mathrm{MeV}$ is in excellent agreement with the data of the BABAR Collaboration [Phys. Rev. D 74, 091103 (2006)], and within errors of calculations is compatible with the result reported by BESIII [Phys. Rev. D 91, 052017 (2015)]. The full width ${\Gamma }_{\mathrm{full}}=\left(91.1±20.5\right)\text{}\text{}\mathrm{MeV}$ of the $Y\left(2175\right)$ saturated by its three strong decay channels is in a reasonable agreement with existing experimental data.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/105323</dc:identifier>
  <dc:identifier>oai:zenodo.org:105323</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physical Review D 101(7)</dc:source>
  <dc:title>Nature of the vector resonance $Y\left(2175\right)$</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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