Author:
Wang En,Xie Ju-Jun,Geng Li-Sheng,Oset Eulogio
Abstract
Abstract
We investigate the
invariant mass distribution in the
reaction at a center-of-mass energy of
GeV measured by the BESIII collaboration, which concluded that no significant signals were observed for
because of the low statistics. We show, however, that the
invariant mass distribution is compatible with the existence of the
state, appearing as a peak, and a strong cusp structure at the
threshold, resulting from the molecular nature of the
state, which provides a substantial contribution to the reaction. This is consistent with our previous analysis of the
decay measured by the LHCb collaboration. We strongly suggest further measurements of this process with more statistics to clarify the nature of the
and
resonances.
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics
Cited by
8 articles.
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