Measurement of the muon beam direction and muon flux for the T2K neutrino experiment

Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Juget, Frédéric; Pistillo, Ciro (2015). Measurement of the muon beam direction and muon flux for the T2K neutrino experiment. Progress of theoretical and experimental physics, 2015(5), 53C01-540. Oxford University Press 10.1093/ptep/ptv054

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The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure muon neutrino beam produced at the J-PARC accelerator facility. The T2K muon monitor was installed to measure the direction and stability of the muon beam which is produced together with the muon neutrino beam. The systematic error in the muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the muon monitor and the direction of the neutrino beam has been tuned to within 0.3 mrad with respect to the designed beam-axis. In order to understand the muon beam properties, measurement of the absolute muon yield at the muon monitor was conducted with an emulsion detector. The number of muon tracks was measured to be (4.06 ± 0.05) × 10⁴ cm⁻² normalized with 4 × 10¹¹protons on target with 250 kA horn operation. The result is in agreement with the prediction which is corrected based on hadron production data.

Item Type:

Journal Article (Original Article)


10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Ariga, Akitaka; Ariga, Tomoko; Ereditato, Antonio; Juget, Frédéric and Pistillo, Ciro


500 Science > 530 Physics




Oxford University Press




Ciro Pistillo

Date Deposited:

23 Jun 2016 09:21

Last Modified:

26 Jun 2016 02:17

Publisher DOI:


Additional Information:

Kollaboration. Es sind nur die Berner Autoren namentlich erwähnt.




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