The Tokai to Kamioka (T2K) long-baseline neutrino experiment consists of a muon neutrino beam, produced at the J-PARC accelerator, a near detector complex and a large 295-km-distant far detector. The present work utilizes the T2K event timing measurements at the near and far detectors to study neutrino time of flight as a function of derived neutrino energy. Under the assumption of a relativistic relation between energy and time of flight, constraints on the neutrino rest mass can be derived. The sub-GeV neutrino beam in conjunction with timing precision of order tens of ns provide sensitivity to neutrino mass in the few MeV/c2 range. We study the distribution of relative arrival times of muon and electron neutrino candidate events at the T2K far detector as a function of neutrino energy. The 90% C.L. upper limit on the mixture of neutrino mass eigenstates represented in the data sample is found to be mν2<5.6 MeV2/c4.

Upper bound on neutrino mass based on T2K neutrino timing measurements / Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bartet Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B.E., Berkman, S., Bhadra, S., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 93:1(2016). [10.1103/PhysRevD.93.012006]

Upper bound on neutrino mass based on T2K neutrino timing measurements

BERARDI, Vincenzo;MAGALETTI, Lorenzo;
2016

Abstract

The Tokai to Kamioka (T2K) long-baseline neutrino experiment consists of a muon neutrino beam, produced at the J-PARC accelerator, a near detector complex and a large 295-km-distant far detector. The present work utilizes the T2K event timing measurements at the near and far detectors to study neutrino time of flight as a function of derived neutrino energy. Under the assumption of a relativistic relation between energy and time of flight, constraints on the neutrino rest mass can be derived. The sub-GeV neutrino beam in conjunction with timing precision of order tens of ns provide sensitivity to neutrino mass in the few MeV/c2 range. We study the distribution of relative arrival times of muon and electron neutrino candidate events at the T2K far detector as a function of neutrino energy. The 90% C.L. upper limit on the mixture of neutrino mass eigenstates represented in the data sample is found to be mν2<5.6 MeV2/c4.
2016
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.012006
Upper bound on neutrino mass based on T2K neutrino timing measurements / Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G.J., Barr, G., Bartet Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B.E., Berkman, S., Bhadra, S., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 93:1(2016). [10.1103/PhysRevD.93.012006]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/110551
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