The reaction and molecular states

L. R. Dai; G. Y. Wang; X. Chen; E. Wang; E. Oset; D. M. Li

doi:10.1140/epja/i2019-12706-6

EPJ

The $Mathematical equation: $B^{+} \rightarrow J/\psi\omega K^{+}$$ reaction and $Mathematical equation: $D^{\ast} \bar{D}^{\ast}$$ molecular states

L. R. Dai¹^,2^*, G. Y. Wang³, X. Chen¹, E. Wang³, E. Oset² and D. M. Li³

¹ Department of Physics, Liaoning Normal University, 116029, Dalian, China
² Departamento de Fısica Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Apartado 22085, 46071, Valencia, Spain
³ School of Physics and Engineering, Zhengzhou University, 450001, Zhengzhou, Henan, China

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 22 November 2018
Accepted: 23 January 2019
Published online: 15 March 2019

Abstract

We study the $Mathematical equation: $ B^{+} \rightarrow J/\psi \omega K^{+}$$ reaction, and show that it is driven by the presence of two resonances, the X(3940) and X(3930), that are of molecular nature and couple most strongly to $Mathematical equation: $ D^{\ast} \bar{D}^{\ast}$$ , but also to $Mathematical equation: $ J/\psi\omega$$ . Because of that, in the $Mathematical equation: $ J/\psi\omega$$ mass distribution we find a peak related to the excitation of the resonances and a cusp with large strength at the $Mathematical equation: $ D^{\ast} \bar{D}^{\ast}$$ threshold.

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EPJ

The reaction and molecular states

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The $Mathematical equation: $B^{+} \rightarrow J/\psi\omega K^{+}$$ reaction and $Mathematical equation: $D^{\ast} \bar{D}^{\ast}$$ molecular states