1 223 KamLAND 2014 ( 26 ) KamLAND 144 Ce CeLAND 8 Li IsoDAR CeLAND IsoDAR ν e ν µ ν τ ν 1 ν 2 ν MNS m 2 21
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- しげじろう おおふさ
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1 1 3 KamLAND shimizu@awa.tohoku.ac.jp 014 ( 6 ) KamLAND 144 Ce CeLAND 8 Li IsoDAR CeLAND IsoDAR.1 ν e ν µ ν τ ν 1 ν ν MNS m 1 = ev m 31 m 3 = ev 100 m ν e [1] 71 Ga SAGEGallex ν e [] LSND MiniBooNE ν e [3, 4] (WMAP + PLANCK + SPT + BAO + H 0 ) [5] m 41 1 ev ν 4 LEP Z M Z / ν e ν µ ν τ ν e ν µ ν τ
2 4 (N eff =3.046). (3 + 1) (3 + ) 1 ev 1 m ν ν 5 ν 4 ν 3 ν ν 1 ν e ν s ν µ ν τ m atm m J ν e ν s ν µ ν τ m atm m J 1: (3 + 1) ν e ν µ ν τ ν s ν α = 4 U αi ν i (α = eµτs) (1) i=1 U αi 4 4 ν i m i m 4 ( m 41 m 31 m 1) ( m P ( ( ) ν e ( ) ν e ) = 1 sin θ ee sin 41 L 4E ( m P ( ( ) ν µ ( ) ν µ ) = 1 sin θ µµ sin 41 L 4E ( m P ( ( ) ν µ ( ) ν e ) = sin θ eµ sin 41 L 4E ) ) () ) (3) (4) E L θ ee θ µµ θ eµ sin θ ee = 4 U e4 (1 U e4 ) (5) sin θ µµ = 4 U µ4 (1 U µ4 ) (6) sin θ eµ = 4 U e4 U µ4 (7) U e4 U µ4 1 sin θ eµ 1 4 sin θ ee sin θ µµ (8) ( ) ν e ( ) ν µ ( ) ν e ( ) ν e ( ) ν µ (3+1) m ev [6] MiniBooNE 475 MeV ( ) ν e [4] (3+1) (3+) m 4 m 41 1 ev m 41 KATRIN m 4 [7]
3 3 5 1: β ν e 3σ [1] ν e.7σ [] LSND µ ν e 3.8σ [3] MiniBooNE π ν e.8σ [4] 1 σ [5] KamLAND-Zen nexo <m ββ > U e4 m 4 m s < 0.5 ev95% [8].3 6σ [6] 4σ 1 [9] µ ± π ± ( ) ν e ( ) ν µ Kam- LAND ν e L/E [10] ν e 1 PLANCK N eff =3.36 ± % H 0 N eff =3.5 ± % ν e β 51 Cr Borexino 144 Ce KamLANDBorexinoDaya-Bay [9] KamLAND 1,000 ν e Borexino 300 Daya-Bay0 6 8 Li 3 CeLAND Ce CeLAND KamLAND SaclayITEP CeLAND Ce- 144 Pr 144 Ce- 144 Pr 144 Ce Pr Ce 144 Pr β Q.996 MeV : [9] ν ν e -e 51 Cr >3 MCi SAGELENS ν e or >10 MCi SOXSNO+ 37 Ar 5 MCi RICOCHET ν e ν e -p kci CeLANDSOX Ce 500 kci Daya-Bay
4 Ce : 144 Ce- 144 Pr 144 Pr ν e 144 Pr β 144 Pr β 144 Ce Mayak 3 Ce CeO CeO 144 Ce ν e dn/de (kev 1 ) Neutrino Energy (kev) 3: 144 Ce- 144 Pr ν e β ν e + p e + + n: E ν > 1.8 MeV ν e 144 Ce 35 U: 5.% 39 Pu: 3.7% 144 Ce- 144 Pr ν e ν e CeLAND 144 Ce- 144 Pr β ν e Pr ν e 50% 1.8 MeV β 144 Pr β 0.7%.185 MeV γ γ 18.5 g/cm MeV γ 1. cm 144 Ce γ 16 cm 4 4: 144 Ce γ
![3 KamLAND KamLAND 13 m 1,000 6 1,879 17 0 00 [10] [11] 011 0νββ KamLAND-Zen [1]](/docs-images/100/145590544/images/5-1.jpg "KamLAND ν e [13] 7 Ce 015 144 Ce- 144 Pr ν e CeLAND KamLAND-Zen ν e CeLAND ν e 3.")
5 Ce 3. ν e Mayak 144 Ce 68% ± W/kCi 0.56% 1% 5: 5 75 kci 600 W 80 C 40 C 4 g/s 40 C 0. C 0.5% 3.3 KamLAND KamLAND 13 m 1, , [10] [11] 011 0νββ KamLAND-Zen [1] KamLAND ν e [13] 7 Ce Ce- 144 Pr ν e CeLAND KamLAND-Zen ν e CeLAND ν e 3.4 KamLAND 144 Ce- 144 Pr ν e 1.5 0,000 ν e 144 Ce- 144 Pr ν e
6 6 8. α 13 C(αn) 16 O Xe 13 ton 1,000 ton 6: KamLAND 7: Ce 1. ν e 38 U 3 Th ν e % ν e ν e % Ce Pr β.185 MeV γ 16 cm Cm Am. MeV γ 7 10 B+n 7 Li + α γ KamLAND 3.5 KamLAND r 0 =(x 0 y 0 z 0 ) ν e r =(xyz) L = r r 0 8
7 No oscillation Oscillation (sin θ ee = 0.1, Δm41 Background total 0 = ev ) Events / bin Events / 50 cm L (m) Evis (MeV) : LE ν e Events / 10 kev No oscillation Oscillation (sin θ ee = 0.1, Δm41 = ev ) Background total 0 x Evis (MeV) 9: ν e 11 L/E ν e θ ee m 41 θ eµ 1 00 x L (m) 10: 0 CeLAND kci 100 kci 1.5 Reactor + Ga 1. ν e ν e CeLAND 144 Ce 15 cm m. 1. m ev KamLAND
8 No oscillation 700 sin θ ee = 0.1, Δm41 = 0.5 ev sin θ ee = 0.1, Δm41 = ev 600 Events / bin P(νe νe) L/E (m/mev) 11: L/E ν e ν e sin θ ee =0.1 m 41 =0.5 ev sin θ ee =0.1 m 41 =.0 ev 3. ν e ν e m 41 ν e 1% ν e m 41 1 ev 100 kci 5 KamLAND Δ θ 1: 95%1.5 Reactor +Ga 4 IsoDAR 144 Ce 8 Li 13 IsoDAR (Isotope Decay-At-Rest) [14] CeLAND KamLAND IsoDAR γ 13: IsoDAR 60 MeV Be IsoDAR ν e 60 MeV / amu MIT CP
9 9 31 (3+1) model (3+) model Observed/Predicted Observed/Predicted L/E (m/mev) L/E (m/mev) 14: IsoDAR 5 L/E (3+1) (3+) DAEδALUS IsoDAR KamLAND KamLAND FARO D 5 ma H + Be 0 cm 0 cm Li 7 Li: 99.99% 8 Li 13β 8 Li 0.8 s β Q 14.5 MeV β ν e + p e + + n 9 MeV 144 Ce ν e Be 10 m m 41 1 ev L/E Be KamLAND CeLAND 144 Ce 1 m 41(eV ) % CL IsoDAR Reactor/ SAGE/GALLEX Global fit KATRIN CeLAND DAR sin ee 15: IsoDAR 5 CeLAND 1 95% IsoDAR 8 Li 14 5 L/E (3+1) (3+) IsoDAR 15 IsoDAR CeLAND sin θ ee σ
10 10 3 CeLAND IsoDAR 8 Li ν e m 41 1 ev 5 KamLAND CeLAND IsoDAR KamLAND KamLAND-Zen [10] K. Eguchi et al.phys. Rev. Lett (003); T. Araki et al.phys. Rev. Lett (005). [11] T. Araki et al.nature (005); A. Gando et al.nat. Geosci (011). [1] A. Gando et al.phys. Rev. D (01); A. Gando et al.phys. Rev. Lett (013). [13] A. Gando et al.arxiv: v (013); A. Gando et al.arxiv: v1 (013). [14] A. Bungau et al.phys. Rev. Lett (01). [1] G. Mention et al.phys. Rev. D (011). [] C. Giunti and M. LavederPhys. Rev. C (011). [3] A. Aguilar et al.phys. Rev. D (001). [4] A. A. Aguilar-Arevalo et al.phys. Rev. Lett (013). [5] P. A. R. Ade et al.arxiv: v (013). [6] C. GiuntiarXiv: v1 (013). [7] A. Esmaili and O. L. G. PeresPhys. Rev. D (01). [8] E. Giusarma et al.phys. Rev. D (01). [9] K. N. AbazajianarXiv: v1 (01).
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( ) Note 3 19 12 13 8 8.1 (e ) (µ ) (τ ) ( (ν e,e ) e- (ν µ, µ ) µ- (ν τ,τ ) τ- ) ( ) ( ) (SU(2) ) (W +,Z 0,W ) * 1) 3 * 2) [ ] [ ] [ ] ν e ν µ ν τ e µ τ, e R, µ R, τ R (1a) L ( ) ) * 3) W Z 1/2 ( - )
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