First result of the muon antineutrino disappearance by T2K

  • 分類 物理セミナー
  • 開始 2015/05/18(月)16:00
  • 終了 2015/05/18(月)17:00
  • 会場 Room 115, Building #1, Tokai-campus (TV connection from Room)
  • 講演タイトル
  • 講演者 Asher C. Kaboth (Imperial College London)
  • 言語 英語/English
  • 連絡先 田島治(PHS4924)
  • ウェブサイト
  • 食堂・売店 利用予定なし/0


The T2K experiment observed electron-neutrino appearance from a muon-neutrino beam in 2012. This observation enables T2K to explore the CP violation in the lepton sector by comparing the electron-neutrino appearance and electron-antineutrino appearance. Since 2013, T2K has been accumulating data with an muon antineutrino beam. Only a small portion of the produced muon neutrino oscillates to electron neutrino and the majority oscillates to tau neutrino and disappears because the energy is below the tau-production threshold. The CPT theorem imposes that the disappearance rate must be same for muon neutrino and muon antineutrino. So the comparison between neutrino and antineutrino is a good test of the CPT theorem or to probe for new non-standard interaction of neutrino with matter. In this seminar, we will present T2K's first result of the muon-antineutrino disappearance measurement and compare it with those obtained with the neutrino beam.