University of Minnesota
School of Physics & Astronomy
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Gregory Pawloski

New constraints on muon-neutrino to electron-neutrino transitions in MINOS
MINOS Collaboration, Phys. Rev. D

Download from http://link.aps.org/doi/10.1103/PhysRevD.82.051102

Abstract

This paper reports results from a search for νμ→νe transitions by the MINOS experiment based on a 7×1020 protons-on-target exposure. Our observation of 54 candidate νe events in the far detector with a background of 49.1±7.0(stat)±2.7(syst) events predicted by the measurements in the near detector requires 2sin⁡2(2θ13)sin⁡2θ23<0.12(0.20) at the 90% C.L. for the normal (inverted) mass hierarchy at δCP=0. The experiment sets the tightest limits to date on the value of θ13 for nearly all values of δCP for the normal neutrino mass hierarchy and maximal sin⁡2(2θ23).