$Measurement of the branching fractions for ψ(2s)→e+e- and ψ(2s)→μ+μ-$

Measurement of the branching fractions for ψ(2s)→e+e- and ψ(2s)→μ+μ-

We measure the branching fractions of the ψ(2S) meson to the leptonic final states e+e- and μ+μ- relative to that for ψ(2S)→J/ψπ+π-. The method uses ψ(2S) mesons produced in the decay of B mesons at the Υ(4S) resonance in a data sample collected with the BABAR detector at the Stanford Linear Acceler...

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Bibliographic Details
Main Authors:	Aubert, B, Boutigny, D, Gaillard, J, Hicheur, A, Karyotakis, Y, Lees, J, Robbe, P, Tisserand, V, Palano, A, Pompili, A, Chen, G, Chen, J, Qi, N, Rong, G, Wang, P, Zhu, Y, Eigen, G, Reinertsen, P, Stugu, B, Abrams, G, Borgland, A, Breon, AB, Brown, D, Button-Shafer, J, Cahn, R
Format:	Journal article
Language:	English
Published:	2002

Measurement of the branching fractions for ψ(2s)→e+e- and ψ(2s)→μ+μ-

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