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      Strong \(Z_c^{+}(3900)\rightarrow J/\psi \pi^{+}; \eta_{c} \rho^{+}\) decays in QCD

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          Abstract

          The widths of the strong decays \(Z_c^{+}(3900)\to J/\psi \pi^{+}\) and \(Z_c^{+}(3900)\to \eta_{c} \rho^{+}\) are calculated. To this end, the mass and decay constant of the exotic \(Z_c^{+}(3900)\) state are computed by means of a two-point sum rule. The obtained results are then used to calculate the strong couplings \(g_{Z_{c}J/\psi \pi }\) and \(g_{Z_{c}\eta_{c} \rho }\) employing QCD sum rules on the light-cone supplied by a technique of the soft-meson approximation. We compare our predictions on the mass and decay widths with available experimental data and other theoretical results.

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          Author and article information

          Journal
          2016-01-15
          2016-03-21
          Article
          10.1103/PhysRevD.93.074002
          1601.03847
          431389f7-66c2-4576-b029-ba5b40fb3043

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          History
          Custom metadata
          Phys. Rev. D 93, 074002 (2016)
          11 Pages, 3 Figures and 2 Tables; To be published by Physical Review D
          hep-ph

          High energy & Particle physics
          High energy & Particle physics

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