%0 Journal Article
%T Upper bound on neutrino mass based on T2K neutrino timing measurements
%A T2K Collaboration (Abe, K. et al
%A Cervera-Villanueva, A.
%A Escudero, L.
%A Izmaylov, A.
%A Sorel, M.
%A Stamoulis, P.
%J Physical Review D
%D 2016
%V 93
%N 1
%I Amer Physical Soc
%@ 2470-0010
%G English
%F T2KCollaborationAbe_etal2016
%O WOS:000369325800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2544), last updated on Thu, 25 Feb 2016 16:27:50 +0000
%X 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/c(2) 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 m(v)(2) < 5.6 MeV2/c(4).
%R 10.1103/PhysRevD.93.012006
%U http://arxiv.org/abs/1502.06605
%U https://doi.org/10.1103/PhysRevD.93.012006
%P 012006-15pp