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Exotic mesons with hidden charm as diquark–antidiquark states

Theoretical Physics Division, National Research Centre “Kurchatov Institute”, Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia

E-mail Address: anisovic@thd.pnpi.spb.ru

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M. A. Matveev

Theoretical Physics Division, National Research Centre “Kurchatov Institute”, Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia

E-mail Address: matveev@thd.pnpi.spb.ru

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A. V. Sarantsev

Theoretical Physics Division, National Research Centre “Kurchatov Institute”, Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia

Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, 53115, Germany

E-mail Address: andsar@iskp.uni-bonn.de

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A. N. Semenova

Theoretical Physics Division, National Research Centre “Kurchatov Institute”, Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia

E-mail Address: ala.semenova@gmail.com

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https://doi.org/10.1142/S0217751X15501869Cited by:20 (Source: Crossref)

Abstract

Exotic mesons with hidden strange $(s \bar{s})$ and heavy quark pairs $(Q \bar{Q})$ , where $Q = c$ , $b$ , are considered as diquark–antidiquark systems, $(Q s) \cdot (\bar{Q} \bar{s})$ . Taking into account that these states can recombinate into two-meson ones, we study the interplay of these states in terms of the dispersion relation $D$ -function technique. The classification of exotic mesons is discussed, coefficients for decay modes are given, predictions for new states are presented. The nonet structure for $(Q q) \cdot (\bar{Q} \bar{q})$ , $(Q s) \cdot (\bar{Q} \bar{s})$ , $(Q q) \cdot (\bar{Q} \bar{s})$ -states $(q = u, d)$ is suggested.

Keywords:

PACS: 12.40.Yx, 12.39.-x, 14.40.Lb

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