Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
8pages, 2figures, Talk given by J. Sato at Joint U.S. / Japan Workshop on New Initiatives in Muon Lepton Flavor Violation and
Scientific paper
We study the optimal setup for observation of the CP asymmetry in neutrino factory experiments --- the baseline length, the muon energy and the analysis method. First, we point out that the statistical quantity which has been used in previous works doesn't represent the CP asymmetry. Then we propose the more suitable quantity, $\equiv \chi^{2}_{2} $, which is sensitive to the CP asymmetry. We investigate the behavior of $ \chi^{2}_{2} $ with ambiguities of the theoretical parameters. The fake CP asymmetry due to the matter effect increases with the baseline length and hence the error in the estimation of the fake CP asymmetry grows with the baseline length due to the ambiguities of the theoretical parameters. Namely, we lose the sensitivity to the genuine CP-violation effect in longer baseline.
Koike Masafumi
Ota Toshihiko
Sato Joe
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