Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam
Affiliations
- 1 University of Tokyo, Institute for Cosmic Ray Research, Kamioka Observatory, Kamioka, Japan.
- 2 University of Liverpool, Department of Physics, Liverpool, United Kingdom.
- 3 STFC, Rutherford Appleton Laboratory, Harwell Oxford, and Daresbury Laboratory, Warrington, United Kingdom.
- 4 Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia.
- 5 Kobe University, Kobe, Japan.
- 6 University of Bern, Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), Bern, Switzerland.
- 7 Colorado State University, Department of Physics, Fort Collins, Colorado, USA.
- 8 Université de Lyon, Université Claude Bernard Lyon 1, IPN Lyon (IN2P3), Villeurbanne, France.
- 9 University of Regina, Department of Physics, Regina, Saskatchewan, Canada.
- 10 University of Warwick, Department of Physics, Coventry, United Kingdom.
- 11 Oxford University, Department of Physics, Oxford, United Kingdom.
- 12 UPMC, Université Paris Diderot, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Paris, France.
- 13 H. Niewodniczanski Institute of Nuclear Physics PAN, Cracow, Poland.
- 14 ETH Zurich, Institute for Particle Physics, Zurich, Switzerland.
- 15 INFN Sezione di Bari and Università e Politecnico di Bari, Dipartimento Interuniversitario di Fisica, Bari, Italy.
- 16 University of British Columbia, Department of Physics and Astronomy, Vancouver, British Columbia, Canada.
- 17 York University, Department of Physics and Astronomy, Toronto, Ontario, Canada.
- 18 University of Geneva, Section de Physique, DPNC, Geneva, Switzerland.
- 19 IRFU, CEA Saclay, Gif-sur-Yvette, France.
- 20 Institut de Fisica d'Altes Energies (IFAE), Barcelona Institute of Science and Technology, Campus UAB, Bellaterra (Barcelona), Spain.
- 21 Imperial College London, Department of Physics, London, United Kingdom.
- 22 Lancaster University, Physics Department, Lancaster, United Kingdom.
- 23 Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba, Japan.
- 24 Ecole Polytechnique, IN2P3-CNRS, Laboratoire Leprince-Ringuet, Palaiseau, France.
- 25 Kyoto University, Department of Physics, Kyoto, Japan.
- 26 University of Sheffield, Department of Physics and Astronomy, Sheffield, United Kingdom.
- 27 IFIC (CSIC and University of Valencia), Valencia, Spain.
- 28 University of Tokyo, Department of Physics, Tokyo, Japan.
- 29 INFN Sezione di Padova and Università di Padova, Dipartimento di Fisica, Padova, Italy.
- 30 Queen Mary University of London, School of Physics and Astronomy, London, United Kingdom.
- 31 INFN Sezione di Napoli and Università di Napoli, Dipartimento di Fisica, Napoli, Italy.
- 32 University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, Pennsylvania, USA.
- 33 Warsaw University of Technology, Institute of Radioelectronics, Warsaw, Poland.
- 34 High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
- 35 Okayama University, Department of Physics, Okayama, Japan.
- 36 Miyagi University of Education, Department of Physics, Sendai, Japan.
- 37 TRIUMF, Vancouver, British Columbia, Canada.
- 38 University of Victoria, Department of Physics and Astronomy, Victoria, British Columbia, Canada.
- 39 Duke University, Department of Physics, Durham, North Carolina, USA.
- 40 University of Silesia, Institute of Physics, Katowice, Poland.
- 41 Louisiana State University, Department of Physics and Astronomy, Baton Rouge, Louisiana, USA.
- 42 University of Tokyo, Institute for Cosmic Ray Research, Research Center for Cosmic Neutrinos, Kashiwa, Japan.
- 43 University of Rochester, Department of Physics and Astronomy, Rochester, New York, USA.
- 44 University of Winnipeg, Department of Physics, Winnipeg, Manitoba, Canada.
- 45 University of Colorado at Boulder, Department of Physics, Boulder, Colorado, USA.
- 46 State University of New York at Stony Brook, Department of Physics and Astronomy, Stony Brook, New York, USA.
- 47 National Centre for Nuclear Research, Warsaw, Poland.
- 48 Royal Holloway University of London, Department of Physics, Egham, Surrey, United Kingdom.
- 49 Tokyo Metropolitan University, Department of Physics, Tokyo, Japan.
- 50 Boston University, Department of Physics, Boston, Massachusetts, USA.
- 51 University of Warsaw, Faculty of Physics, Warsaw, Poland.
- 52 Osaka City University, Department of Physics, Osaka, Japan.
- 53 RWTH Aachen University, III. Physikalisches Institut, Aachen, Germany.
- 54 University of California, Irvine, Department of Physics and Astronomy, Irvine, California, USA.
- 55 INFN Sezione di Roma and Università di Roma "La Sapienza," Roma, Italy.
- 56 Michigan State University, Department of Physics and Astronomy, East Lansing, Michigan, USA.
- 57 University of Toronto, Department of Physics, Toronto, Ontario, Canada.
- 58 Wroclaw University, Faculty of Physics and Astronomy, Wroclaw, Poland.
- 59 University of Washington, Department of Physics, Seattle, Washington, USA.
- PMID: 27203315
- DOI: 10.1103/PhysRevLett.116.181801
Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam
Authors
Affiliations
- 1 University of Tokyo, Institute for Cosmic Ray Research, Kamioka Observatory, Kamioka, Japan.
- 2 University of Liverpool, Department of Physics, Liverpool, United Kingdom.
- 3 STFC, Rutherford Appleton Laboratory, Harwell Oxford, and Daresbury Laboratory, Warrington, United Kingdom.
- 4 Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia.
- 5 Kobe University, Kobe, Japan.
- 6 University of Bern, Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics (LHEP), Bern, Switzerland.
- 7 Colorado State University, Department of Physics, Fort Collins, Colorado, USA.
- 8 Université de Lyon, Université Claude Bernard Lyon 1, IPN Lyon (IN2P3), Villeurbanne, France.
- 9 University of Regina, Department of Physics, Regina, Saskatchewan, Canada.
- 10 University of Warwick, Department of Physics, Coventry, United Kingdom.
- 11 Oxford University, Department of Physics, Oxford, United Kingdom.
- 12 UPMC, Université Paris Diderot, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Paris, France.
- 13 H. Niewodniczanski Institute of Nuclear Physics PAN, Cracow, Poland.
- 14 ETH Zurich, Institute for Particle Physics, Zurich, Switzerland.
- 15 INFN Sezione di Bari and Università e Politecnico di Bari, Dipartimento Interuniversitario di Fisica, Bari, Italy.
- 16 University of British Columbia, Department of Physics and Astronomy, Vancouver, British Columbia, Canada.
- 17 York University, Department of Physics and Astronomy, Toronto, Ontario, Canada.
- 18 University of Geneva, Section de Physique, DPNC, Geneva, Switzerland.
- 19 IRFU, CEA Saclay, Gif-sur-Yvette, France.
- 20 Institut de Fisica d'Altes Energies (IFAE), Barcelona Institute of Science and Technology, Campus UAB, Bellaterra (Barcelona), Spain.
- 21 Imperial College London, Department of Physics, London, United Kingdom.
- 22 Lancaster University, Physics Department, Lancaster, United Kingdom.
- 23 Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo Institutes for Advanced Study, University of Tokyo, Kashiwa, Chiba, Japan.
- 24 Ecole Polytechnique, IN2P3-CNRS, Laboratoire Leprince-Ringuet, Palaiseau, France.
- 25 Kyoto University, Department of Physics, Kyoto, Japan.
- 26 University of Sheffield, Department of Physics and Astronomy, Sheffield, United Kingdom.
- 27 IFIC (CSIC and University of Valencia), Valencia, Spain.
- 28 University of Tokyo, Department of Physics, Tokyo, Japan.
- 29 INFN Sezione di Padova and Università di Padova, Dipartimento di Fisica, Padova, Italy.
- 30 Queen Mary University of London, School of Physics and Astronomy, London, United Kingdom.
- 31 INFN Sezione di Napoli and Università di Napoli, Dipartimento di Fisica, Napoli, Italy.
- 32 University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, Pennsylvania, USA.
- 33 Warsaw University of Technology, Institute of Radioelectronics, Warsaw, Poland.
- 34 High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, Japan.
- 35 Okayama University, Department of Physics, Okayama, Japan.
- 36 Miyagi University of Education, Department of Physics, Sendai, Japan.
- 37 TRIUMF, Vancouver, British Columbia, Canada.
- 38 University of Victoria, Department of Physics and Astronomy, Victoria, British Columbia, Canada.
- 39 Duke University, Department of Physics, Durham, North Carolina, USA.
- 40 University of Silesia, Institute of Physics, Katowice, Poland.
- 41 Louisiana State University, Department of Physics and Astronomy, Baton Rouge, Louisiana, USA.
- 42 University of Tokyo, Institute for Cosmic Ray Research, Research Center for Cosmic Neutrinos, Kashiwa, Japan.
- 43 University of Rochester, Department of Physics and Astronomy, Rochester, New York, USA.
- 44 University of Winnipeg, Department of Physics, Winnipeg, Manitoba, Canada.
- 45 University of Colorado at Boulder, Department of Physics, Boulder, Colorado, USA.
- 46 State University of New York at Stony Brook, Department of Physics and Astronomy, Stony Brook, New York, USA.
- 47 National Centre for Nuclear Research, Warsaw, Poland.
- 48 Royal Holloway University of London, Department of Physics, Egham, Surrey, United Kingdom.
- 49 Tokyo Metropolitan University, Department of Physics, Tokyo, Japan.
- 50 Boston University, Department of Physics, Boston, Massachusetts, USA.
- 51 University of Warsaw, Faculty of Physics, Warsaw, Poland.
- 52 Osaka City University, Department of Physics, Osaka, Japan.
- 53 RWTH Aachen University, III. Physikalisches Institut, Aachen, Germany.
- 54 University of California, Irvine, Department of Physics and Astronomy, Irvine, California, USA.
- 55 INFN Sezione di Roma and Università di Roma "La Sapienza," Roma, Italy.
- 56 Michigan State University, Department of Physics and Astronomy, East Lansing, Michigan, USA.
- 57 University of Toronto, Department of Physics, Toronto, Ontario, Canada.
- 58 Wroclaw University, Faculty of Physics and Astronomy, Wroclaw, Poland.
- 59 University of Washington, Department of Physics, Seattle, Washington, USA.
- PMID: 27203315
- DOI: 10.1103/PhysRevLett.116.181801
Abstract
T2K reports its first measurements of the parameters governing the disappearance of ν[over ¯]_{μ} in an off-axis beam due to flavor change induced by neutrino oscillations. The quasimonochromatic ν[over ¯]_{μ} beam, produced with a peak energy of 0.6 GeV at J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the ν[over ¯]_{μ} survival probability is expected to be minimal. Using a data set corresponding to 4.01×10^{20} protons on target, 34 fully contained μ-like events were observed. The best-fit oscillation parameters are sin^{2}(θ[over ¯]_{23})=0.45 and |Δm[over ¯]_{32}^{2}|=2.51×10^{-3} eV^{2} with 68% confidence intervals of 0.38-0.64 and 2.26-2.80×10^{-3} eV^{2}, respectively. These results are in agreement with existing antineutrino parameter measurements and also with the ν_{μ} disappearance parameters measured by T2K.
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