Speaker
Dr
Jorgivan Morais Dias
(Institute of Physics, University of São Paulo, Brazil)
Description
In this work, we have studied the $B_c^-\to \pi^- J/\psi\omega$ and $B_c^-\to \pi^- D^{*}\bar{D}^{*}$ reactions. In particular, we have shown they are related by the presence of two resonances: the $X(3940)$ and $X(3930)$, which are of molecular nature and couple mostly to $D^{*}\bar{D}^{*}$, but also to $J/\psi\omega$. Because of that, in the $J/\psi\omega$ mass distribution we find a cusp with large strength at the $D^{*}\bar{D}^{*}$ threshold and predict the ratio of strengths between the peak of the cusp and the maximum of the $D^{*}\bar{D}^{*}$ distribution close to $D^{*}\bar{D}^{*}$ threshold, which are distinct features of the molecular nature of these two resonances.
Primary author
Dr
Jorgivan Morais Dias
(Institute of Physics, University of São Paulo, Brazil)
Co-authors
Dr
Eulogio Oset
(Departamento de Física Teórica and IFIC, Institutos de Investigación de Paterna, Centro Mixto Universidad de Valencia-CSIC)
Mrs
Liang-Rong Dai
(Department of Physics, Liaoning Normal University)
