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Phys. Rev. D 75, 013011 (2007) [8 pages]

Leptonic CP violation studies at MiniBooNE in the (3+2) sterile neutrino oscillation hypothesis

G. Karagiorgi, A. Aguilar-Arevalo, J. M. Conrad, and M. H. Shaevitz
Department of Physics, Columbia University, New York, New York 10027, USA

K. Whisnant
Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

M. Sorel
Instituto de Física Corpuscular, IFIC, CSIC and Universidad de Valencia, Spain

V. Barger
Department of Physics, University of Wisconsin, Madison, Wisconsin 53715, USA
Received 3 October 2006; published 29 January 2007

We investigate the extent to which leptonic CP-violation in (3+2) sterile neutrino models leads to different oscillation probabilities for [overline nu ]µ-->[overline nu ]e and nuµ-->nue oscillations at MiniBooNE. We are using a combined analysis of short-baseline (SBL) oscillation results, including the LSND and null SBL results, to which we impose additional constraints from atmospheric oscillation data. We obtain the favored regions in MiniBooNE oscillation probability space for both (3+2) CP-conserving and (3+2) CP-violating models. We further investigate the allowed CP-violation phase values and the MiniBooNE reach for such a CP violation measurement. The analysis shows that the oscillation probabilities in MiniBooNE neutrino and antineutrino running modes can differ significantly, with the latter possibly being as much as 3 times larger than the first. In addition, we also show that all possible values of the single CP-violation phase measurable at short baselines in (3+2) models are allowed within 99% CL by existing data.

©2007 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevD.75.013011
DOI: 10.1103/PhysRevD.75.013011
PACS: 14.60.Pq; 14.60.St; 12.15.Ff
  • 14.60.Pq
    Neutrino mass and mixing
  • 14.60.St
    Non-standard-model neutrinos, right-handed neutrinos, etc.
  • 12.15.Ff
    Quark and lepton masses and mixing in electroweak interactions
  • YEAR: 2007

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