Title

Atmospheric, Long Baseline, and Reactor Neutrino Data Constraints on ?13

Document Type

Article

Publication Date

2009

Publication Title

Physical Review Letters

Department

Physics

Abstract

An atmospheric neutrino oscillation tool that uses full three-neutrino oscillation probabilities and a full three-neutrino treatment of the Mikheyev-Smirnov-Wolfenstein effect, together with an analysis of the K2K, MINOS, and CHOOZ data, is used to examine the bounds on ?13. The recent, more finely binned, Super-K atmospheric data are employed. For L/E??104??km/GeV, we previously found significant linear in ?13 terms. This analysis finds ?13 bounded from above by the atmospheric data while bounded from below by CHOOZ. The origin of this result arises from data in the previously mentioned very long baseline region; here, matter effects conspire with terms linear in ?13 to produce asymmetric bounds on ?13. Assuming CP conservation, we find ?13=?0.07+0.18?0.11 (90% C.L.).

ISSN

0031-9007