Indications of neutrino oscillation in a 250 km long-baseline experiment.
By K. C. M. H. Ahn, et al.. Physical Review Letters, 2002
703 citations recorded by the source corpus.
The K2K experiment observes indications of neutrino oscillation: a reduction of nu(mu) flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, with an expectation of 80.1(+6.2)(-5.4). Twenty-nine one ring mu-like events are used to reconstruct the neutrino energy spectrum, which is better matched to the expected spectrum with neutrino oscillation than without. The probability that the observed flux at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/4637622b3482fdb234dac0a7f90ad21a3e7d5ac0
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- FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: COSMOLOGICAL INTERPRETATION (2008, neutral): “…solar neutrinos (Davis et al. 1968; Cleveland et al. 1998; Hampel et al. 1999; Abdurashitov et al. 1999; Fukuda et al. 2001b,a; Ahmad et al. 2002; Ahmed et al. 2004), reactor neutrinos (Eguchi et al. 2003; Araki et al. 2005), and accelerator beam neutrinos (Ahn et al. 2003; Michael et al. 2006).”
- Sterile Neutrino Fits to Short-Baseline Neutrino Oscillation Measurements (2012, methodology): “Thismakes use of two datasets: (1) 1489 days of Super-K muon-like and electron-like events with energies in the subto multi-GeV range, taking into account atmospheric flux predictions from [65] and treating systematic uncertainties according to [66]; (2) ν μ disappearance data from the longbaseline ”
- Invited review: Physics potential of the ICAL detector at the India-based Neutrino Observatory (INO) (2015, background): “The pioneering solar neutrino experiments of Davis and collaborators in the USA [23, 24], the water Cherenkov detector Kamiokande [25] and its successor the gigantic Super-Kamiokande (SK) [26, 27], the gallium detectors SAGE [28] in Russia and Gallex [29], GNO [30] at the Laboratorio National di Gra”
- Flavor structures of charged fermions and massive neutrinos (2019, background): “The fact that θ23 is very close to π/4 has also been observed in a number of long-baseline accelerator neutrino oscillation experiments, such as K2K with L ' 250 km [68, 396], MINOS with L ' 735 km [397, 398], T2K with L ' 295 km [70, 71] and NOνA with L ' 810 km [399, 400].”
- Physics at Super B Factory (2004, background): “Neutrino mixing νμ-ντ was first discovered in atmospheric neutrino measurements at Super-Kamiokande [208], and it is being further confirmed by the K2K experiment [209].”
- Sterile neutrinos in cosmology (2017, methodology): “The Super-Kamiokande atmospheric neutrino experiment sees a zenith angle dependence of the atmospheric neutrino flux that is fit most simply with an model of neutrino masses for the μ and τ flavored neutrinos, νμ and ντ , split by a mass difference of |δmatm| ∼ 50 meV [5], and this has been verified”
- Series expansions for three-flavor neutrino oscillation probabilities in matter (2004, positive): “The results of the atmospheric neutrino experiments [1, 2, 3] and the K2K accelerator neutrino experiment [4] have allowed the determination of the fundamental neutrino parameters ∆m(2)31 and θ23 to an accuracy of about 30% and 15%, respectively, while the solar neutrino experiments [5] and the KamL”
- Current unknowns in the three-neutrino framework (2018, methodology): “At the time of the previous review [1] on this Journal, long-baseline (LBL) accelerator searches for νμ → νμ disappearance had been performed only by the KEK-to-Kamioka (K2K) experiment [115, 116], later followed by the Main Injector Neutrino Oscillation Search (MINOS) experiment [117] that also sta”