Improved search for muon-neutrino to electron-neutrino oscillations in MINOS

Adamson, P.; Auty, D.J.; Ayres, D.S.; Backhouse, C.; Barr, G.; Betancourt, M.; Bishai, M.; Blake, A.; Bock, G.J.; Boehnlein, D.J.

doi:10.1103/PhysRevLett.107.181802

Improved search for muon-neutrino to electron-neutrino oscillations in MINOS

MINOS

Collaboration

•

P. Adamson
(
- Fermilab
)

Aug, 2011

5 pages

Published in:

Phys.Rev.Lett. 107 (2011) 181802

e-Print:

1108.0015 [hep-ex]

DOI:

10.1103/PhysRevLett.107.181802

PDG: sin

^2(\theta _{13})

Report number:

FERMILAB-PUB-11-351-PPD,
BNL-96120-2011-JA

Experiments:

FNAL-E-0875

View in:

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reference search934 citations

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Abstract: (arXiv)

We report the results of a search for

\nu_{e}

appearance in a

\nu_{\mu}

beam in the MINOS long-baseline neutrino experiment. With an improved analysis and an increased exposure of

8.2\times10^{20}

protons on the NuMI target at Fermilab, we find that

2\sin^2(\theta_{23})\sin^2(2\theta_{13})<0.12\ (0.20)

at 90% confidence level for

\delta\mathord{=}0

and the normal (inverted) neutrino mass hierarchy, with a best fit of

2\sin^2(\theta_{23})\sin^2(2\theta_{13})\,\mathord{=}\,0.041^{+0.047}_{-0.031}\ (0.079^{+0.071}_{-0.053})

. The

\theta_{13}\mathord{=}0

hypothesis is disfavored by the MINOS data at the 89% confidence level.

Note:

5 pages, 3 figures

14.60.Pq
14.60.Lm
29.27.-a
neutrino: mass: hierarchy
MINOS
neutrino: oscillation
neutrino/mu: beam
neutrino/e: particle identification
neutrino: mixing angle
experimental results

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