Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-10-11
Phys.Rev.D80:113012,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages, 15 figures; version to appear in PRD; minor changes, including additional references
Scientific paper
10.1103/PhysRevD.80.113012
We discuss precision measurements of the leading atmospheric parameters at a standard neutrino factory with a detector that is sensitive to muons alone. The oscillation of the muon- and electron neutrinos in the neutrino factory beam to tau neutrinos adds to the muon events sample (both right sign and wrong sign) via leptonic decays of the taus produced through charge-current interactions in the detector. In particular, we study how this affects a precision measurement of the atmospheric mixing parameters and the deviation of nu_mu <--> nu_tau mixing from maximality. In spite of the enhancement of the number of events due to the additional tau contribution, the determination of the atmospheric mixing angle and the deviation from maximality will be poorer. We show that it is impossible to devise satisfactory cuts to remove this tau contamination. Neglect of these tau contributions will lead to an incorrect conclusion about the precision obtainable at such a neutrino factory.
Indumathi D.
Sinha Nita
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