Determining the upper limit of Gamma_{ee} for the Y(4260)

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

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Determining the upper limit of Gamma_(ee) for the Y(4260)

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arxiv hep-ex/0603024 v2 pith:DYNZI23E submitted 2006-03-13 hep-ex

Determining the upper limit of Gamma_(ee) for the Y(4260)

X.H.Mo , G.Li , C.Z.Yuan , K.L.He , H.M.Hu , J.H.Hu , P.Wang , Z.Y.Wang This is my paper

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keywords gammalimitupperwidthbabarcollaborationdecaydetermined

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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 580 eV at 90% C.L. Together with the BABAR measurement on the product of Gamma_{ee} and BR(Y(4260) --> pi+pi- J/psi), this implies a large decay width of Y(4260) --> pi+pi- J/psi final states.

Determining the upper limit of Gamma_(ee) for the Y(4260)

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