12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Measurement of neutrino oscillation parameters ...
View graph of relations

« Back

Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam

Research output: Contribution to journalJournal article

Published

Article number211803
Journal publication date19/11/2013
JournalPhysical Review Letters
Journal number21
Volume111
Number of pages7
Original languageEnglish

Abstract

The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to 3.01×1020 protons on target. In the absence of neutrino oscillations, 205±17 (syst) events are expected to be detected while only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum, assuming three neutrino flavors and normal mass hierarchy yields a best-fit mixing angle sin⁡2(θ23)=0.514±0.082 and mass splitting |Δm322|=2.44-0.15+0.17×10-3  eV2/c4. Our result corresponds to the maximal oscillation disappearance probability.

Bibliographic note

© 2013 American Physical Society