Improved Search for {nu}{sub {mu}}{yields}{nu}{sub e} Oscillation in a Long-Baseline Accelerator Experiment

Journal Article · Fri May 12 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.181801· OSTI ID:20775235

Yamamoto, S; Hasegawa, M; Hayashi, K; Hiraide, K; Inagaki, T; Kubota, J; Kurimoto, Y; Maesaka, H; Morita, T; Nakaya, T; Nishikawa, K; Sasaki, T; Sato, H; Ueda, S; Yokoyama, M ^[1]; Zalipska, J ^[2]; Aliu, E; Andringa, S; Espinal, X; Fernandez, E ^[3]

---

1. Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
2. A. Soltan Institute for Nuclear Studies, 00-681 Warsaw (Poland)
3. Institut de Fisica d'Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)

We performed an improved search for {nu}{sub {mu}}{yields}{nu}{sub e} oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2x10{sup 19} protons on target. No evidence for a {nu}{sub e} appearance signal was found, and we set bounds on the {nu}{sub {mu}}{yields}{nu}{sub e} oscillation parameters. At {delta}m{sup 2}=2.8x10{sup -3} eV{sup 2}, the best-fit value of the K2K {nu}{sub {mu}} disappearance analysis, we set an upper limit of sin{sup 2}2{theta}{sub {mu}}{sub e}<0.13 at a 90% confidence level.

• OSTI ID: 20775235
• Journal Information: Physical Review Letters, Vol. 96, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.96.181801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ELECTRON NEUTRINOS
MUON NEUTRINOS
NEUTRINO OSCILLATION
PROTONS