T2K neutrino flux prediction

T2K Collaboration and Finch, Alexander and Kormos, Laura and Bertram, Iain and Ratoff, Peter and Bentham, Steven and Reeves, Matthew and Grant, Nick and Southwell, Luke and O'Keeffe, Helen and Dealtry, Thomas James (2013) T2K neutrino flux prediction. Physical Review D, 87 (1). ISSN 1550-7998

[thumbnail of PhysRevD.87.012001.pdf]
PhysRevD.87.012001.pdf - Published Version

Download (4MB)


The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axismuon neutrino beam with a peak energy of about 0.6 GeV that originates at the Japan Proton Accelerator Research Complex accelerator facility. Interactions of the neutrinos are observed at near detectors placed at 280 m from the production target and at the far detector-Super-Kamiokande-located 295 km away. The flux prediction is an essential part of the successful prediction of neutrino interaction rates at the T2K detectors and is an important input to T2K neutrino oscillation and cross section measurements. A FLUKA and GEANT3-based simulation models the physical processes involved in the neutrino production, from the interaction of primary beam protons in the T2K target, to the decay of hadrons and muons that produce neutrinos. The simulation uses proton beam monitor measurements as inputs. The modeling of hadronic interactions is reweighted using thin target hadron production data, including recent charged pion and kaon measurements from the NA61/SHINE experiment. For the first T2K analyses the uncertainties on the flux prediction are evaluated to be below 15% near the flux peak. The uncertainty on the ratio of the flux predictions at the far and near detectors is less than 2% near the flux peak.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
Additional Information:
© 2013 American Physical Society
ID Code:
Deposited By:
Deposited On:
22 Apr 2013 09:00
Last Modified:
18 Oct 2023 00:48