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: email@example.com
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