# Determining the upper limit of Γee for the Y(4260)

## 内容摘要

 By fitting the R values between 3.7 and 5.0 GeV measured by the BES Collaboration, the upper limit of the electron width of the newly discovered resonance Y(4260) is determined to be 240 eV at 90% C.L. Together with the BaBar measurement on Γee• B(Y(4260) → π+π- J/ψ), this implies a large decay width of Y (4260) → π+π- J/ψ final states.

[V1] 2017-03-26 19:36:59 chinaXiv:201703.00608V1 下载全文

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