Measurement of Neutrino Oscillation Parameters from Muon Neutrino Disappearance with an Off-Axis Beam
Data(s) |
19/11/2013
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Resumo |
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 and only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum assuming three neutrino flavors, normal mass hierarchy and θ23≤π/4 yields a best-fit mixing angle sin2(2θ23)=1.000 and mass splitting |Δm232|=2.44×10−3 eV2/c4. If θ23≥π/4 is assumed, the best-fit mixing angle changes to sin2(2θ23)=0.999 and the mass splitting remains unchanged. |
Formato |
application/pdf application/pdf |
Identificador |
http://boris.unibe.ch/48885/1/1308.0465.pdf http://boris.unibe.ch/48885/7/PhysRevLett.111.pdf Abe, K.; Adam, J.; Aihara, H.; Akiri, T.; Andreopoulos, C.; Aoki, S.; Ariga, Tomoko; Assylbekov, S.; Autiero, D.; Barbi, M.; Barker, G. J.; Barr, G.; Bass, M.; Batkiewicz, M.; Bay, F.; Bentham, S. W.; Berardi, V.; Berger, B. E.; Berkman, S.; Bertram, I.; ... (2013). Measurement of Neutrino Oscillation Parameters from Muon Neutrino Disappearance with an Off-Axis Beam. Physical review letters, 111(21) American Physical Society 10.1103/PhysRevLett.111.211803 <http://dx.doi.org/10.1103/PhysRevLett.111.211803> doi:10.7892/boris.48885 info:doi:10.1103/PhysRevLett.111.211803 urn:issn:0031-9007 |
Idioma(s) |
eng |
Publicador |
American Physical Society |
Relação |
http://boris.unibe.ch/48885/ |
Direitos |
info:eu-repo/semantics/openAccess info:eu-repo/semantics/restrictedAccess |
Fonte |
Abe, K.; Adam, J.; Aihara, H.; Akiri, T.; Andreopoulos, C.; Aoki, S.; Ariga, Tomoko; Assylbekov, S.; Autiero, D.; Barbi, M.; Barker, G. J.; Barr, G.; Bass, M.; Batkiewicz, M.; Bay, F.; Bentham, S. W.; Berardi, V.; Berger, B. E.; Berkman, S.; Bertram, I.; ... (2013). Measurement of Neutrino Oscillation Parameters from Muon Neutrino Disappearance with an Off-Axis Beam. Physical review letters, 111(21) American Physical Society 10.1103/PhysRevLett.111.211803 <http://dx.doi.org/10.1103/PhysRevLett.111.211803> |
Palavras-Chave | #530 Physics |
Tipo |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed |