https://doi.org/10.1140/epjc/s10052-017-5169-y
Regular Article - Theoretical Physics
Triangle singularities in 
and 
Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, Aptdo.22085, 46071, Valencia, Spain
* e-mail: rpavao@ific.uv.es
Received:
6
July
2017
Accepted:
24
August
2017
Published online:
11
September
2017
The possible role of the triangle mechanism in the 
decay into 
and 
is investigated. In this process, the triangle singularity appears from the decay of into 
followed by the decay of 
into 
and the fusion of the 
, which forms the 
or 
, which finally decay into 
or 
, respectively. The triangle mechanism from the 
loop generates a peak around 1420 MeV in the invariant mass of 
or 
, and it gives sizable branching fractions, 
and 
.
© The Author(s), 2017
