Upper bound on neutrino mass based on T2K neutrino timing measurements

Ariga, Akitaka; Ereditato, Antonio; Göldi, Damian; Hierholzer, Martin; Nirkko, Martti; Pistillo, Ciro; Redij, Asmita Ajit (2015). Upper bound on neutrino mass based on T2K neutrino timing measurements. Physical review. D - particles, fields, gravitation, and cosmology, 93(1), p. 12006. American Physical Society 10.1103/PhysRevD.93.012006

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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 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^2 < 5.6 MeV^2/c^4.

Item Type:

Journal Article (Original Article)

Division/Institute:

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; Ereditato, Antonio; Göldi, Damian; Hierholzer, Martin; Nirkko, Martti; Pistillo, Ciro and Redij, Asmita Ajit

Subjects:

500 Science > 530 Physics

ISSN:

1550-7998

Publisher:

American Physical Society

Language:

English

Submitter:

Ciro Pistillo

Date Deposited:

23 Jun 2016 12:35

Last Modified:

23 Jun 2016 12:35

Publisher DOI:

10.1103/PhysRevD.93.012006

ArXiv ID:

1502.06605v1

Additional Information:

Kollaboration. Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.82775

URI:

https://boris.unibe.ch/id/eprint/82775

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