| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9861551 | Physics Letters B | 2005 | 7 Pages |
Abstract
The Ï-meson leptonic widths, Îee and Îμμ, are obtained, respectively, from the e+eâ forward-backward asymmetry and the μ+μâ cross section around the Ï-mass energy. We find Îee=1.32±0.05±0.03keV and ÎeeÎμμ=1.320±0.018±0.017keV. These results, compatible with Îee=Îμμ, provide a precise test of lepton universality. Combining the two results gives Îââ(Ï)=1.320±0.023keV.
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
KLOE Collaboration KLOE Collaboration, F. Ambrosino, A. Antonelli, M. Antonelli, C. Bacci, M. Barva, P. Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, V. Bocci, F. Bossi, D. Bowring, P. Branchini, S.A. Bulychjov, R. Caloi, P. Campana, G. Xu,