English

$f_2(1810)$ as a triangle singularity

High Energy Physics - Phenomenology 2017-02-22 v3
Authors: Ju-Jun Xie , Li-Sheng Geng , Eulogio Oset
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Abstract

We perform calculations showing that a source producing K∗Kˉ∗K^* \bar{K}^* in J=2J = 2 and L=0L=0 gives rise to a triangle singularity at 18101810 MeV with a width of about 200200 MeV from the mechanism K∗→πKK^* \to \pi K and then KKˉ∗K\bar{K}^* merging into the a1(1260)a_1(1260) resonance. We suggest that this is the origin of the present f2(1810)f_2(1810) resonance and propose to look at the πa1(1260)\pi a_1(1260) mode in several reactions to clarify the issue.

Cite

@article{arxiv.1610.09592,
  title  = {$f_2(1810)$ as a triangle singularity},
  author = {Ju-Jun Xie and Li-Sheng Geng and Eulogio Oset},
  journal= {arXiv preprint arXiv:1610.09592},
  year   = {2017}
}

Comments

more discussions; version published in Physical Review D

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