Chinese Physics C > 2014, Vol. 38 > Issue(4): 043001 DOI: 10.1088/1674-1137/38/4/043001

Evidence for resonant structures in e⁺e^-→π⁺π^-h_c

YUAN Chang-Zheng

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
The cross sections of e ⁺e ^-→π ⁺π ^-h _cat 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 ^-→π ⁺π ^-h _cline shape. The fit to the line shape results in a narrow structure at a mass of (4216±18)MeV/ c ²and a width of (39±32)MeV, and a possible wide structure of mass (4293±9)MeV/ c ²and width (222±67)MeV. Here, the errors are combined statistical and systematic errors. This may indicate that the Y(4260) state observed in e ⁺e ^-→π ⁺π ^-J/ψ has a fine structure in it.

References

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YUAN Chang-Zheng. Evidence for resonant structures in e ⁺e ^-→π ⁺π ^-h _c[J]. Chinese Physics C, 2014, 38(4): 043001. doi: 10.1088/1674-1137/38/4/043001

YUAN Chang-Zheng. Evidence for resonant structures in e ⁺e ^-→π ⁺π ^-h _c[J]. Chinese Physics C, 2014, 38(4): 043001. doi:10.1088/1674-1137/38/4/043001 shu

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Received: 2013-12-24
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Evidence for resonant structures in e⁺e^-→π⁺π^-h_c

YUAN Chang-Zheng

1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received Date:2013-12-24
Accepted Date:1900-01-01
Available Online:2014-04-05

Abstract:The cross sections of e⁺e^-→π⁺π^-h_cat 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^-→π⁺π^-h_cline shape. The fit to the line shape results in a narrow structure at a mass of (4216±18)MeV/c²and a width of (39±32)MeV, and a possible wide structure of mass (4293±9)MeV/c²and width (222±67)MeV. Here, the errors are combined statistical and systematic errors. This may indicate that the Y(4260) state observed in e⁺e^-→π⁺π^-J/ψ has a fine structure in it.