Author:
Zhu 朱 Wenjing 文静,Wang 王 Xiaolong 小龙
Abstract
Abstract
We determine the resonant parameters of the vector states
and
by performing a combined fit to the
cross sections from the threshold to
measured by the BaBar, Belle, BESIII, and CMD-3 experiments. The mass
and width
are obtained for
, and the mass
and width
are obtained for
. The statistical significance of
is
. Depending on the interference between
,
, and a non-resonant
amplitude in the nominal fit, we obtain four solutions and
,
,
or
, and
,
,
or
. We also search for the production of
, and the significance is only
. We then determine the upper limit of
at the 90% confidence level.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics