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Evidence for resonant structures in e+e- to pi+pi-h_c

High Energy Physics - Experiment 2014-11-19 v3 High Energy Physics - Phenomenology

Abstract

The cross sections of e+e- to pi+pi-h_c at center-of-mass energies from 3.90 to 4.42 GeV were measured by the BESIII and the CLEO-c experiments. Resonant structures are evident in the e+e- to pi+pi-h_c line shape, the fit to the line shape results in a narrow structure at a mass of (4216\pm 18) MeV/c^2 and a width of (39\pm 32) MeV, and a possible wide structure of mass (4293\pm 9) MeV/c^2 and width (222\pm 67) MeV. Here the errors are combined statistical and systematic errors. This may indicate that the Y(4260) state observed in e+e- to pi+pi-J/psi has fine structure in it.

Keywords

Cite

@article{arxiv.1312.6399,
  title  = {Evidence for resonant structures in e+e- to pi+pi-h_c},
  author = {Chang-Zheng Yuan},
  journal= {arXiv preprint arXiv:1312.6399},
  year   = {2014}
}

Comments

One typo corrected: (3.2+-1.5) eV ==> (0.32+-0.15) eV as pointed out by A. Pilloni. Conclusion not affected

R2 v1 2026-06-22T02:33:40.052Z