${f}_{2}(1810)$ as a triangle singularity

$f_{2} (1810)$ as a triangle singularity

Ju-Jun Xie, Li-Sheng Geng, and E. Oset

Phys. Rev. D 95, 034004 – Published 8 February 2017

Abstract

We perform calculations showing that a source producing $K^{*} {\bar{K}}^{*}$ in $J = 2$ and $L = 0$ gives rise to a triangle singularity at 1810 MeV with a width of about 200 MeV from the mechanism $K^{*} \to π K$ and then $K {\bar{K}}^{*}$ merging into the $a_{1} (1260)$ resonance. We suggest that this is the origin of the present $f_{2} (1810)$ resonance and propose to look at the $π a_{1} (1260)$ mode in several reactions to clarify the issue.

Received 7 November 2016

DOI:https://doi.org/10.1103/PhysRevD.95.034004

Physics Subject Headings (PhySH)

Hadron-hadron interactions

Particles & Fields

Authors & Affiliations

Ju-Jun Xie¹, Li-Sheng Geng^2,*, and E. Oset^1,3

¹Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
²School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China
³Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, Apartado 22085, 46071 Valencia, Spain

^*lisheng.geng@buaa.edu.cn

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Vol. 95, Iss. 3 — 1 February 2017

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Physical Review D

covering particles, fields, gravitation, and cosmology