Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-05-16
Phys.Rev.D64:096006,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
ReVTeX, 28 pages, 7 figues. v2: Modifications in section VIII to reflect the fact that some of the couplings that were discuss
Scientific paper
10.1103/PhysRevD.64.096006
Measurements of CP--violating observables in neutrino oscillation experiments have been studied in the literature as a way to determine the CP--violating phase in the mixing matrix for leptons. Here we show that such observables also probe new neutrino interactions in the production or detection processes. Genuine CP violation and fake CP violation due to matter effects are sensitive to the imaginary and real parts of new couplings. The dependence of the CP asymmetry on source--detector distance is different from the standard one and, in particular, enhanced at short distances. We estimate that future neutrino factories will be able to probe in this way new interactions that are up to four orders of magnitude weaker than the weak interactions. We discuss the possible implications for models of new physics.
Gonzalez-Garcia M. C.
Grossman Yuval
Gusso Andre
Nir Yosef
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