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1. chinaXiv:201703.00608 [pdf]

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

X. H. Mo; G. Li; C. Z. Yuan; K. L. He; H. M. Hu; Hu J. H.; P. Wang; Z. Y. Wang
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties

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.

submitted time 2017-03-26 Hits12713Downloads954 Comment 0

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