Kam LAND precise 13 Chooz Palo Verde Double

原子炉ニュートリノで何ができるか？ Kam. LAND precise 13 Chooz, Palo. Verde Double. Chooz, RENO, Dayabay m 212, 12 sin 22 13=0. 1 assumed Normal Hierarchy Inverted Hierarchy No experiment yet m 213 Very precise 12 Mass Hierarchy 080520 3

もっと高精度な sin 22 13 測定 非常に高統計では、エネルギースペクトルの歪みから, 13 がより高精度で測定できる ( sin 22 13<0. 01) P. Hauber et al. hrp-ph/0303232 RENO DC 090923 DB F. Suekane@ERICE 09 1000 ton x 20 GW x 5 year 4

Parameter region to determine non-0 加速器 原子炉 10 ton x 20 GW x 5 year 100 ton x 20 GW x 5 year Determine H. Sugiyama hep-ph/0411209 v 1 If sin 22 13>0. 05 there is a possibility to determine non-0 090923 F. Suekane@ERICE 09 8

原子炉ニュートリノ振動を 50 kmで測定 Principle Petcov et al. , Phys. Lett. B 533, 94 (2002) S. Choubey et al. , Phys. Rev. D 68, 113006 (2003) J. Learned et al. , hep-ex/062022 L. Zhan et al. , hep-ex/0807. 3203 M. Batygov et al. , hep-ex/0810. 2508 さざ波 It is essential that 12 is not maximum (tan 2 12~0. 4) フーリエ解析 => にピーク 小さいピークが 大きなピークが 32 31 Power 31 32 w w : Normal Hierarchy : Inverted Hierarchy

IH NH w Note; this method does not use the matter effect. sにミュレーション(J. Learned et al. ar. Xive-0612022) もし、 sin 22 13=0. 05, 3 kton x 24 GW x 5 yr , で 1 s 有効性． (L. Zhan et al. => Mass Hierarchy could be determined if sin 22 13>0. 005. ) Sensitivityについてより詳細なstudyが必要

neutrino Mass Hierarchy determination by Hyper Kamiokande HK LOI L NH Earth detector IH sin 2 23=0. 6 sin 2 23=0. 5 sin 2 23=0. 4 精度は 23 縮退に依存する

An issue of accelerator 13 measurement; 23 degenearcy sin 22 23 is measured by nm nm disappearance by accelerator, but there are 2 possibilities of sin 2 23 if sin 22 23 is not 1 or 0. For example, for sin 22 23=0. 95 sin 2 23=0. 39 or 0. 61. This is called 23 degeneracy and it will become problematic when measuring the mass hierarchy by accelerator experiments.

23 degeneracy

Settlement of 23 Degeneracy K. Hiraide, et al. PRD 73, 093008(2006) Accelerator Only sin 2 Q 23 Accelerator 4 MW*0. 54 Mt 2+6 years Accelerator+Reactor: 100 t * 20 GW *5 y 090923 F. Suekane@ERICE 09 17

Reactor anomaly から予想される sin 22 14~0. 12

距離~180 km, 検出器=1000トン， P~数十GWth Kam. LAND

世界の研究状況 = Applied Antineutrino Physics Workshops = (応用反ニュートリノ物理研究会) 1 st: 2004/2/ 2 nd: 2005/12/ 3 rd: 2006/9/ 4 th: 2007/12/ 5 th: 2009/4/ 6 th: 2010/8/ 7 th: 2011/9/ @ハワイ大学, USA @ハワイ大学， USA @ ローレンスリバモア国立研究所, USA @APC, フランス @ Angra, ブラジル @東北大，日本 @ウイーン，オーストリア IAEA主催のワークショップ 1 st: 2003/12/ "Meeting to Evaluate Potential Applicability of Antineutrino Detection Technologies for Safeguards Purposes". 2 nd: 2008/10/ "Focused Workshop on Antineutrino Detection for Safeguards Applications" 3 rd: 2011/9/"ad hoc Working group meeting on safeguard application of Antineutrino Detectors"

Neutrinos may be useful for safeguards of the world.

Back up sides

Complementarity of Reactor-Accelerator 13 measurement 23 degeneracy Matter effect dependece L=300 km by Yasuda Reactor Measurement Accelerator Measurement