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_. The method uses Ψ(2S) mesons produced in the decay of B mesons at the Y(45) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the Ψ(2S) →J/Ψπ+π- branching fraction, we determine the e+e- and π+π- branching fractions to be 0.0078±0.0009±0.0008 and 0.0067±0. 0008±0.0007, respectively.

Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2002). Measurement of the branching fractions for Ψ(2S)→e +e- and Ψ(2S)→μ+-. PHYSICAL REVIEW D, 65(3) [10.1103/PhysRevD.65.031101].

Measurement of the branching fractions for Ψ(2S)→e +e- and Ψ(2S)→μ+-

CARPINELLI, Massimo;
2002

Abstract

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_. The method uses Ψ(2S) mesons produced in the decay of B mesons at the Y(45) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the Ψ(2S) →J/Ψπ+π- branching fraction, we determine the e+e- and π+π- branching fractions to be 0.0078±0.0009±0.0008 and 0.0067±0. 0008±0.0007, respectively.
Articolo in rivista - Articolo scientifico
article; electron; elementary particle; energy; luminance; mass; measurement; signal detection;
English
2002
65
3
031101
none
Aubert, B., Boutigny, D., Gaillard, J., Hicheur, A., Karyotakis, Y., Lees, J., et al. (2002). Measurement of the branching fractions for Ψ(2S)→e +e- and Ψ(2S)→μ+-. PHYSICAL REVIEW D, 65(3) [10.1103/PhysRevD.65.031101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390049
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