https://doi.org/10.1140/epjc/s10052-020-7966-y
Regular Article - Theoretical Physics
Testing the origin of the “
” with the 
reaction
1
Department of Physics, Guangxi Normal University, Guilin, 541004, China
2
Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin, 541004, China
3
Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, Aptdo.22085, 46071, Valencia, Spain
* e-mail: liangwh@gxnu.edu.cn
Received:
16
January
2020
Accepted:
24
April
2020
Published online:
12
May
2020
We study the 
reactions with 
and 
, in the region of 
invariant masses of 
MeV. The strong coupling of the 
resonance to 
makes the mechanism based on 
exchange very efficient to produce this resonance observed in the invariant mass distribution. In addition, in all these reactions one observes an associated peak at 1420 MeV which comes from the decay mode of the when the is placed on shell at higher invariant masses. We call the attention to the possibility that the peaks observed in other reactions where the “” is observed have a similar origin.
© The Author(s), 2020
