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arXiv · 1312.6399

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

Chang-Zheng Yuan
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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.

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Chang-Zheng Yuan. 2014-11-18. Evidence for resonant structures in e+e- to pi+pi-h_c. https://doi.org/10.1088/1674-1137%2F38%2F4%2F043001

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