| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9861277 | Physics Letters B | 2005 | 8 Pages |
Abstract
The decay rate of the long-lived neutral K meson into the e+eâe+eâ final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br(KLâe+eâe+eâ)=(3.30±0.24stat±0.23syst±0.10norm)Ã10â8.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
A. Lai, D. Marras, A. Bevan, R.S. Dosanjh, T.J. Gershon, B. Hay, G.E. Kalmus, C. Lazzeroni, D.J. Munday, M.D. Needham, E. Olaiya, M.A. Parker, T.O. White, S.A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar, L. Widhalm,