English

The process $e^+e^- \to \pi \pi X(3823)$ in the soft pion limit

High Energy Physics - Phenomenology 2015-07-01 v2 High Energy Physics - Experiment

Abstract

The production of the resonance X(3823)X(3823), identified as the charmonium 3D2^3D_2 state, in the process e+eππX(3823)e^+e^- \to \pi \pi X(3823) has been recently reported by BESIII. It is pointed out that this process is fully described, up to one overall coupling constant, in the soft pion limit. An interpretation of the available and possible future data within the discussed theoretical framework may reveal new features of the charmoniumlike states. In particular, the observed relative yield for this process at different energies strongly suggests a very significant enhancement of the amplitude at the charmoniumlike peak near 4.36\,GeV.

Keywords

Cite

@article{arxiv.1504.02973,
  title  = {The process $e^+e^- \to \pi \pi X(3823)$ in the soft pion limit},
  author = {M. B. Voloshin},
  journal= {arXiv preprint arXiv:1504.02973},
  year   = {2015}
}

Comments

7 pages, 2 figures

R2 v1 2026-06-22T09:14:42.908Z