Molecular picture for the (2866) as a = 0 State and Related 1 ,2 States
R. Molina (Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071 Valencia, Spain); E. Oset (Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071 Valencia, Spain)
We recall the predictions made ten years ago about a bound state of in of the system, which is manifestly exotic, and we associate it to the state reported in the recent LHCb experiment. Fine tuning the parameters to reproduce exactly the mass and width of the state, we report two more states stemming from the same interaction, one with and the other with . For reasons of parity, the state cannot be observed in decay, and we suggest to observe it in the spectrum. On the other hand, the state can be observed in decay but the present experiment has too small statistics in the region of its mass to make any claim. We note that measurements of the spectrum and of the with more statistics should bring important information concerning the nature of the and related ones that could be observed.