Study of ψ(2S) → μ+μ- Decay with KEDR Detector
Abstract
Since 2004 the KEDR detector at the VEPP-4M collider has taken several data sets in the ψ(2S) region, acquiring total luminosity of about 7 pb-1, which corresponds to more than 3.5 × 106ψ(2S).
We report the preliminary value of Γee × Γμμ/Γ = 19.4 ± 0.4 ± 1.1 eV for ψ(2S).- Publication:
-
International Journal of Modern Physics Conference Series
- Pub Date:
- December 2014
- DOI:
- 10.1142/S2010194514604621
- Bibcode:
- 2014IJMPS..3560462A