Measurement of neutrino oscillation by the K2K experiment
Physical Review D - Particles, Fields, Gravitation and Cosmology Volume 74 Issue 7
Page 072003-1-072003-39
published_at 2006-10-12
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| File | |
| Title ( eng ) |
Measurement of neutrino oscillation by the K2K experiment
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| Creator |
K2K Collaboration
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| Source Title |
Physical Review D - Particles, Fields, Gravitation and Cosmology
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| Volume | 74 |
| Issue | 7 |
| Start Page | 072003-1 |
| End Page | 072003-39 |
| Abstract |
We present measurements of νμ disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One-hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158.1-8.6+9.2 events without oscillation. A distortion of the energy spectrum is also seen in 58 single-ring muonlike events with reconstructed energies. The probability that the observations are explained by the expectation for no neutrino oscillation is 0.0015% (4.3σ). In a two-flavor oscillation scenario, the allowed Δm2 region at sin 22θ=1 is between 1.9 and 3.5×10-3eV2 at the 90% C.L. with a best-fit value of 2.8×10-3eV2.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2006-10-12 |
| Rights |
Copyright (c) 2006 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1550-7998
[DOI] 10.1103/PhysRevD.74.072003
[NCID] AA00773624
[DOI] http://dx.doi.org/10.1103/PhysRevD.74.072003
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