Molecular picture for the X0(2866) as a D⁎K¯⁎ JP = 0+ state and related 1+,2+ states

We recall the predictions made ten years ago about a bound state of JP=0+ in I=0 of the D⁎K¯⁎ system, which is manifestly exotic, and we associate it to the X0(2866) state reported in the recent LHCb experiment. Fine tuning the parameters to reproduce exactly the mass and width of the X0(2866) state...

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Bibliographic Details
Main Authors: R. Molina, E. Oset
Format: Article
Language:English
Published: Elsevier 2020-12-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269320306730
Description
Summary:We recall the predictions made ten years ago about a bound state of JP=0+ in I=0 of the D⁎K¯⁎ system, which is manifestly exotic, and we associate it to the X0(2866) state reported in the recent LHCb experiment. Fine tuning the parameters to reproduce exactly the mass and width of the X0(2866) state, we report two more states stemming from the same interaction, one with 1+ and the other with 2+. For reasons of parity, the 1+ state cannot be observed in DK¯ decay, and we suggest to observe it in the D⁎K¯ spectrum. On the other hand, the 2+ state can be observed in DK¯ 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 D⁎K¯ spectrum and of the DK¯ with more statistics should bring important information concerning the nature of the X0(2866) and related ones that could be observed.
ISSN:0370-2693