Upper bound on neutrino mass based on T2K neutrino timing measurements



Abe, K, Adam, J, Aihara, H, Akiri, T, Andreopoulos, C ORCID: 0000-0003-2020-8215, Aoki, S, Ariga, A, Assylbekov, S, Autiero, D, Barbi, M
et al (show 342 more authors) (2016) Upper bound on neutrino mass based on T2K neutrino timing measurements PHYSICAL REVIEW D, 93 (1). 012006-. ISSN 2470-0010, 2470-0029

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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.

Item Type: Article
Uncontrolled Keywords: hep-ex, hep-ex, hep-ph, nucl-ex, physics.ins-det
Depositing User: Symplectic Admin
Date Deposited: 03 May 2017 09:12
Last Modified: 16 Jun 2026 09:55
DOI: 10.1103/PhysRevD.93.012006
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3007214
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