Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of νe interactions at the far detector
| dc.contributor.author | Abe, K. | |
| dc.contributor.author | Hillairet, Anthony | |
| dc.contributor.author | Karlen, Dean | |
| dc.contributor.author | et al. | |
| dc.contributor.author | T2K Collaboration | |
| dc.date.accessioned | 2020-01-16T20:43:07Z | |
| dc.date.available | 2020-01-16T20:43:07Z | |
| dc.date.copyright | 2017 | en_US |
| dc.date.issued | 2017 | |
| dc.description.abstract | The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. A sample of electron neutrino candidates at Super-Kamiokande in which a pion decay has been tagged is added to the four single-ring samples used in previous T2K oscillation analyses. Through combined analyses of these five samples, simultaneous measurements of four oscillation parameters, |Δm232|, sin2θ23, sin2θ13, and δCP and of the mass ordering are made. A set of studies of simulated data indicates that the sensitivity to the oscillation parameters is not limited by neutrino interaction model uncertainty. Multiple oscillation analyses are performed, and frequentist and Bayesian intervals are presented for combinations of the oscillation parameters with and without the inclusion of reactor constraints on sin2θ13. When combined with reactor measurements, the hypothesis of CP conservation (δCP=0 or π) is excluded at 90% confidence level. The 90% confidence region for δCP is [−2.95,−0.44] ([−1.47,−1.27]) for normal (inverted) ordering. The central values and 68% confidence intervals for the other oscillation parameters for normal (inverted) ordering are Δm232=2.54±0.08(2.51±0.08)×10−3 eV2/c4 and sin2θ23=0.55+0.05−0.09 (0.55+0.05−0.08), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for sin2θ23 (Bayes factor 2.4). | en_US |
| dc.description.reviewstatus | Reviewed | en_US |
| dc.description.scholarlevel | Faculty | en_US |
| dc.description.sponsorship | We thank the J-PARC staff for superb accelerator performance. We thank the CERN NA61/SHINE Collaboration for providing valuable particle production data. We acknowledge the support of MEXT, Japan; NSERC (Grant No. SAPPJ-2014-00031), NRC and CFI, Canada; CEA and CNRS/IN2P3, France; DFG, Germany; INFN, Italy; National Science Centre (NCN) and Ministry of Science and Higher Education, Poland; RSF, RFBR, and MES, Russia; MINECO and ERDF funds, Spain; SNSF and SERI, Switzerland; STFC, UK; and DOE, USA. We also thank CERN for the UA1/NOMAD magnet, DESY for the HERA-B magnet mover system, NII for SINET4, the WestGrid and SciNet consortia in Compute Canada, and GridPP and the Emerald High Performance Computing facility in the United Kingdom. In addition, participation of individual researchers and institutions has been further supported by funds from ERC (FP7), H2020 Grant No. RISE-GA644294-JENNIFER, EU; JSPS, Japan; Royal Society, UK; and the Alfred P. Sloan Foundation and the DOE Early Career program, USA. | en_US |
| dc.identifier.citation | Abe, K.; Amey, J.; Andreopoulos, C.; Antonova, M.; Aoki, S.; Ariga, A.; … & Zito, M. (2017). Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of νe interactions at the far detector. Physical Review D, 96(9), article 92006. DOI: 10.1103/PhysRevD.96.092006 | en_US |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevD.96.092006 | |
| dc.identifier.uri | http://hdl.handle.net/1828/11488 | |
| dc.language.iso | en | en_US |
| dc.publisher | Physical Review D | en_US |
| dc.subject | Neutrino interactions | |
| dc.subject | Neutrino oscillations | |
| dc.subject | Neutrinos | |
| dc.subject.department | Department of Physics and Astronomy | |
| dc.title | Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of νe interactions at the far detector | en_US |
| dc.type | Article | en_US |