Search for heavy neutrinos with the T2K near detector ND280
| dc.contributor.author | Abe, K. | |
| dc.contributor.author | Akutsu, R. | |
| dc.contributor.author | Ali, A. | |
| dc.contributor.author | Andreopoulos, C. | |
| dc.contributor.author | Anthony, L. | |
| dc.contributor.author | Antonova, M. | |
| dc.contributor.author | Aoki, S. | |
| dc.contributor.author | Ariga, A. | |
| dc.contributor.author | Ashida, Y. | |
| dc.contributor.author | Awataguchi, Y. | |
| dc.contributor.author | Azuma, Y. | |
| dc.contributor.author | Ban, S. | |
| dc.contributor.author | Barbi, M. | |
| dc.contributor.author | Barker, G.J. | |
| dc.contributor.author | Barr, G. | |
| dc.contributor.author | Barry, C. | |
| dc.contributor.author | Batkiewicz-Kwasniak, M. | |
| dc.contributor.author | Bench, F. | |
| dc.contributor.author | Karlen, Dean | |
| dc.contributor.author | et al. | |
| dc.date.accessioned | 2021-05-07T17:24:39Z | |
| dc.date.available | 2021-05-07T17:24:39Z | |
| dc.date.copyright | 2019 | en_US |
| dc.date.issued | 2019 | |
| dc.description.abstract | This paper reports on the search for heavy neutrinos with masses in the range 140 < M N < 493 MeV / c 2 using the off-axis near detector ND280 of the T2K experiment. These particles can be produced from kaon decays in the standard neutrino beam and then subsequently decay in ND280. The decay modes under consideration are N → ℓ ± α π ∓ and N → ℓ + α ℓ − β ( − ) ν ( α , β = e , μ ) . A search for such events has been made using the Time Projection Chambers of ND280, where the background has been reduced to less than two events in the current dataset in all channels. No excess has been observed in the signal region. A combined Bayesian statistical approach has been applied to extract upper limits on the mixing elements of heavy neutrinos to electron-, muon- and tau- flavored currents ( U 2 e , U 2 μ , U 2 τ ) as a function of the heavy neutrino mass, e.g., U 2 e < 10 − 9 at 90% C.L. for a mass of 390 MeV / c 2 . These constraints are competitive with previous experiments. | en_US |
| dc.description.reviewstatus | Reviewed | en_US |
| dc.description.scholarlevel | Faculty | en_US |
| dc.description.sponsorship | 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 in the United Kingdom. In addition, participation of individual researchers and institutions has been further supported by funds from ERC (FP7), “la Caixa” Foundation (ID 100010434, fellowship code LCF/BQ/ IN17/11620050), the European Union’s Horizon 2020 Research and Innovation programme under the Marie Sklodowska-Curie Grant agreement No. 713673 and H2020 Grant No. RISE-GA644294-JENNIFER 2020; JSPS, Japan; Royal Society, UK; the Alfred P. Sloan Foundation and the DOE Early Career program, USA; RFBR research project No. 18-32-00072, Russia. | en_US |
| dc.identifier.citation | Abe, K., Akutsu, R., Ali, A., Andreopoulos, C., Anthony, L., Karlen, D., … Zykova, A. (2019). Search for heavy neutrinos with the T2K near detector ND280. Physical Review D, 100(5), 1-10. https://doi.org/10.1103/PhysRevD.100.052006. | en_US |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevD.100.052006 | |
| dc.identifier.uri | http://hdl.handle.net/1828/12954 | |
| dc.language.iso | en | en_US |
| dc.publisher | Physical Review D | en_US |
| dc.subject.department | Department of Physics and Astronomy | |
| dc.title | Search for heavy neutrinos with the T2K near detector ND280 | en_US |
| dc.type | Article | en_US |