Study of neutrinoless double-beta decay using the neutrino detector, KamLAND

2013 Fiscal Year Final Research Report

• Project/Area Number: 21000001
• Research Category: Grant-in-Aid for Specially Promoted Research
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering; Mathematics and Physics
• Research Institution: Tohoku University
• Principal Investigator: INOUE Kunio 東北大学, ニュートリノ科学研究センター, 教授 (10242166)
• Co-Investigator(Renkei-kenkyūsha): SHIRAI Junpei 東北大学, ニュートリノ科学研究センター, 准教授 (90171032) ; MITSUI Tadao 東北大学, ニュートリノ科学研究センター, 准教授 (20283864)
• Project Period (FY): 2009 – 2013
• Keywords: 素粒子(実験)

Research Abstract

The world highest sensitivity of the search for neutrino-less double beta decay has been quickly and cost-effectively achieved by deploying large amount of ^<136>Xe in the huge and ultra-low radioactivity environment, KamLAND. The previous positive claim with ^<76>Ge has been refuted by a combined analysis with an experiment using the same nuclei. Also an upper limit on the effective Majorana mass of 120～250meV has been obtained. Simultaneously, more precise geo-neutrino observation with the reactor-off data started to examine Earth models.

Research Products

• [Journal Article] Reactor on-off antineutrino measurement with KamLAND (2013)
  • Author(s): A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K.Inoue, K. Ishidoshiro, H. Ishikawa, M. Koga, R. Matsuda, S. Matsuda, T. Mitsui, D. Motoki, K. Nakamura, A. Obata, A. Oki, Y. Oki, M. Otani, I. Shimizu, J. Shirai et al.(46名) (KamLAND collaboration)
  • Journal Title: Physical Review D Volume: 88 Pages: 033001-10
  • Peer Reviewed
• [Journal Article] Limit on Neutrinolessββ Deacy of ^<136>Xe from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in ^<76>Ge (2013)
  • Author(s): A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K.Inoue, K. Ishidoshiro, R. Kato, M. Koga, S. Matsuda, T. Mitsui, D. Motoki, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, M. Otani, I. Shimizu, J. Shirai et al.(42名)(KamLAND-Zen collaboration)
  • Journal Title: Physical Review Letters Volume: 110 Pages: 062502-5
  • Peer Reviewed
• [Journal Article] Limits on Majoron-emiting double-p decays of ^<136>Xe in the KamLAND-Zen experiment (2012)
  • Author(s): A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, R. Kato, M. Koga, S. Matsuda, T. Mitsui, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, I. Shimizu, J. Shirai et al.(39名)(KamLAND-Zen collaboration)
  • Journal Title: Physical Review C Volume: 86 Pages: 021601-4
  • Peer Reviewed
• [Journal Article] Measurement of the double-βdecay half-life of ^<136>Xe with the KamLAND-Zen experiment (2012)
  • Author(s): A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue, R. Kato, M. Koga, S. Matsuda, T. Mitsui, T. Nakada, K. Nakamura, A. Obata, A. Oki, Y. Ono, I. Shimizu, J. Shirai et al.(39名)(KamLAND-Zen collaboration)
  • Journal Title: Physical Review Volume: C85 Pages: 045504-6
  • Peer Reviewed
• [Journal Article] Search for extraterrestrial antineutrino sources with the KamLAND detector (2011)
  • Author(s): A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K.Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shiai et al.(66名)(KamLAND collaboration)
  • Journal Title: The Astrophysical Journal Volume: 745 Pages: 1938
  • Peer Reviewed
• [Journal Article] Partial radiogenic heat model for Earth revealed by geoneutrino measurements (2011)
  • Author(s): A. Gando, Y. Gando, K. Ichinlura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai et al. (66名)(KamLAND collaboration)
  • Journal Title: nature geoscience Volume: 4 Pages: 647-651
  • Peer Reviewed
• [Journal Article] Measurement of the ^8B solar neutrino flux with the KamLAND liquid scintillator detector (2011)
  • Author(s): S. Abe, K. Furuno, A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, W. Kimura, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, M. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai et al.(79名) (KamLAND collaboration)
  • Journal Title: Physical Review C Volume: 84 Pages: 035804-6
  • Peer Reviewed
• [Journal Article] Constraints on θ_<13> from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND (2011)
  • Author(s): A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimito, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu, Y. Shimizu, J. Shirai et al.(65名)(KamLAND collaboration)
  • Journal Title: Physical Review D Volume: 83 Pages: 052002-11
  • Peer Reviewed
• [Journal Article] Production of radioactive isotopes through cosmic muon spallation in KamLAND (2010)
  • Author(s): S. Abe, S. Enonloto, K. Furuno, Y. Gando, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, M. Nakamura, I. Shimizu, Y. Shimizu, J. Shirai et al.(82名)(KamLAND collaboration)
  • Journal Title: Physical Review C Volume: 18 Pages: 025807-14
  • Peer Reviewed
• [Presentation] KamLAND-Zen実験の現状と将来 (2014)
  • Author(s): 丸藤祐仁
  • Organizer: 日本物理学会第69回年次大会「二重べータ崩壊研究の最前線」シンポジウム
  • Place of Presentation: 東海大学
  • Year and Date: 2014-03-28
• [Presentation] KamLAND (2013)
  • Author(s): 石徹白晃治
  • Organizer: International Workshop on Next Generation Nucleaon Decay and Neutrino Detectors(NNN13)
  • Place of Presentation: 東京大学
  • Year and Date: 2013-11-11
• [Presentation] Status of the KamLAND-Zen Experiment (2013)
  • Author(s): P. Decowski
  • Organizer: 13^<th> International Conference on Topics in Astroparticle and Underground Physics (TAUP2013)
  • Place of Presentation: Asilomar, USA
  • Year and Date: 2013-09-10
• [Presentation] Past and Present Experiments of Geo Neutrinos (2013)
  • Author(s): 清水格
  • Organizer: 13^<th> International Conference on Topics in Astroparticle and Underground Physics (TAUP2013)
  • Place of Presentation: Asilomar, USA
  • Year and Date: 2013-09-09
• [Presentation] (2013)
  • Author(s): 白井淳平
  • Organizer: The Status of KamLAND-Zen for neutrino-less Double Beta Decay of ^<136>Xe
  • Place of Presentation: Moscow, Russia
  • Year and Date: 2013-08-23
• [Presentation] KamLAND2-Zen (2013)
  • Author(s): 清水格
  • Organizer: 天文学・宇宙物理学中規模計画の展望
  • Place of Presentation: 日本学術会議講堂
  • Year and Date: 2013-05-28
• [Presentation] Status of KamLAND-Zen (2013)
  • Author(s): 井上邦雄
  • Organizer: Opportunities in Underground Physics for Snowmass
  • Place of Presentation: Asilomar, USA
  • Year and Date: 2013-05-26
• [Presentation] KamLAND2-Zen (2013)
  • Author(s): 井上邦雄
  • Organizer: 極低バックグラウンド素粒子原子核研究懇談会
  • Place of Presentation: 富山市
  • Year and Date: 2013-04-23
• [Presentation] KamLAND-Zen (2013)
  • Author(s): 中村健悟
  • Organizer: Neutrino Telescopes 2013
  • Place of Presentation: Venice, Italy
  • Year and Date: 2013-03-14
• [Presentation] KamLAND (2013)
  • Author(s): 渡辺寛子
  • Organizer: Neutrino Telescopes 2013
  • Place of Presentation: Venice, Italy
  • Year and Date: 2013-03-12
• [Presentation] 非加速器素粒子原子核実験 (2013)
  • Author(s): 井上邦雄
  • Organizer: 素粒子物理・原子核物理分野の「大型施設計画・大規模研究計画マスタープラン」に関するシンポジウム
  • Place of Presentation: 港区
  • Year and Date: 2013-02-08
• [Presentation] KamLAND-Zen Status and Future (2012)
  • Author(s): 白井淳平
  • Organizer: Neutrino Oscillation Workshop(NOW2012)
  • Place of Presentation: Otranto, Italy
  • Year and Date: 2012-09-10
• [Presentation] Status of KamLAND-Zen (2012)
  • Author(s): 井上邦雄
  • Organizer: Neutrlnos and Dark Matter in Nuclear Physics
  • Place of Presentation: 奈良市
  • Year and Date: 2012-06-11
• [Presentation] Results from KamLAND-Zen (2012)
  • Author(s): 井上邦雄
  • Organizer: The XXV International Conference on Neutrino and Astrophysics(Neutrino 2012)
  • Place of Presentation: 京都市
  • Year and Date: 2012-06-06
• [Presentation] Present Status of KamLAND-Zen (2011)
  • Author(s): 丸藤祐仁
  • Organizer: International Workshop on Double Beta Decay and Neutrinos (DBD11)
  • Place of Presentation: 大阪
  • Year and Date: 2011-11-15
• [Presentation] Ov2βin KamLAND-Zen and SNO+ (2011)
  • Author(s): 井上邦雄
  • Organizer: Workshop on Lepton and Baryon Number Violation (BLV2011)
  • Place of Presentation: Gatlinburg, USA
  • Year and Date: 2011-09-23
• [Presentation] 地下における素粒子実験の展望 (2011)
  • Author(s): 井上邦雄
  • Organizer: 日本物理学会秋季大会「10年先を俯瞰した高エネルギー物理学の将来展望」シンポジウム
  • Place of Presentation: 弘前大学
  • Year and Date: 2011-09-17
• [Presentation] Low energy neutrino physics at KamLAND (2011)
  • Author(s): 渡辺寛子
  • Organizer: 12^<th> International Conference on Topics in Astroparticle and Underground Physics (TAUP11)
  • Place of Presentation: Munich, Germany
  • Year and Date: 2011-09-06
• [Presentation] KamLAND-Zenの将来計画 (2010)
  • Author(s): 井上邦雄
  • Organizer: 二重べータ崩壊研究懇談会
  • Place of Presentation: 岩沼市
  • Year and Date: 2010-12-17
• [Presentation] KamLANDの将来計画 (2010)
  • Author(s): 井上邦雄
  • Organizer: 宇宙線研究者会議将来計画シンポジウム
  • Place of Presentation: 東京大学
  • Year and Date: 2010-09-16
• [Presentation] Low-energy neutrino physics with KamLAND (2010)
  • Author(s): 三井唯夫
  • Organizer: Neutrino Oscillation Workshop (NOW2010)
  • Place of Presentation: Otranto, Italy
  • Year and Date: 2010-09-06
• [Presentation] KamLAND-Zen : Search for neutrino-less double-beta decay with the neutrino detector (2010)
  • Author(s): 井上邦雄
  • Organizer: Fundamental Physics Using Atoms
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-08-09
• [Presentation] KamLAND double beta experiment using ^<136>Xe (2010)
  • Author(s): 古賀真之
  • Organizer: 35^<th> International Conference on High Energy Physics (ICHEP2010)
  • Place of Presentation: Paris, France
  • Year and Date: 2010-07-24
• [Presentation] New Geo-neutrino Measurement with KamLAND (2010)
  • Author(s): 井上邦雄
  • Organizer: The XXIV International Conference on Neutrino Physics and Astrophysics (Neutrino 2010)
  • Place of Presentation: Athens, Greece
  • Year and Date: 2010-06-19
• [Presentation] Liquid Scintillator based experiments in Oν Double Beta Decay (2010)
  • Author(s): 中村健悟
  • Organizer: The XXIV International Conference on Neutrino Physics and Astrophysics (Neutrino 2010)
  • Place of Presentation: Athens, Greece
  • Year and Date: 2010-06-16
• [Remarks]
  • URL: http://www.awa.tohoku.ac.jp/kamland/