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

分类： 物理学 >> 凝聚态:结构、力学和热性能 提交时间： 2017-03-26

X. H. Mo G. Li C. Z. Yuan K. L. He H. M. Hu Hu J. H. P. Wang Z. Y. Wang

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.

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