21-25 May 2018
Budker INP
Asia/Novosibirsk timezone

Disclosing $D^{*}\bar{D}^{*}$ molecular states in the $B_c^-\to \pi^- J/\psi\omega$ decay

23 May 2018, 14:30
17m
Budker INP

Budker INP

Lavrentiev av. 11, Novosibirsk 630090

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)

Presentation Materials