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- やすもり はまもり
- 5 years ago
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2 Abstract Spin of the proton is 1. The proton is composed of three valence quarks, sea quarks 2 and gluons. The gluon mediates strong interaction between quarks. The proton spin is the sum of spin and orbital angular momenta which the quarks and the gluons carry. Light mass quarks, i.e. up, down, strange quarks and their anti-quarks, exist as the sea quarks inside the proton. In particular, the spin of strange quarks and anti-strange quarks( s) can be measured in neutrino-nucleon scattering experiment. In such a experiment, it is important to detect the scattering effectively because neutrino-nucleon cross section is small. The s will be measured in neutrino-nucleon scattering using neutrino eam at high intensity proton accelerator J-PARC. The J-PARC is under construction at Tokai village in Ibaraki Prefecture. It is necessary to measure accurately recoil proton track in the neutral current neutrino-nucleon scattering. Water-soluble liquid scintillator is one of candidates for the detector. The watersoluble liquid scintillator is composed of water for a solvent, an emission agent and a surfactant which dissolves the emission agent in the water. It can be used an active target. The fraction of the proton is rather large. Comparing with an organic liquid scintillator, attenuation length is rather short. It is however known that its attenuation length short. This is in fact an advantage. I arrange optical fibers in the water-soluble liquid scintillator. Then, the scintillation light from the recoil proton of low energy can be detected. We aim at accurate measurement of the recoil proton track. Properties of the water-soluble liquid scintillator are not well known, except that its attenuation length is short. I made some water-soluble liquid scintillators of different solvents, with and without a wave length shifter agent. I measured the emission spectra and its variation with time over one month. During this period, I evaluated shoulder location and slope of the emission spectra. I found that the shoulder location has moved 22.4 to higher channel and the slope has decreased by 5.7 in that period. I report the properties of the water-soluble liquid scintillator based on my measurements.
3 1 valence 3 sea 2 sea ( s) - s (J-PARC) 700MeV 1 active target
4 1 3 2 s s K2K
5 A Appendix 63 A A A A
6 1 valence sea 1 2 = 1 2 Σ + G + L q + L g (1.1) Σ valence sea G L q L g valence sea Σ u v + d v + u s + d s + s s + ū s + d s + s s (1.2) sea s s - s (J-PARC) PPO PPO 3 s 2 s
7 2 s ( ) 1980 CERN EMC 12±9±14 DESY HERMES BNL PHENIX valence sea 1 2 = 1 2 Σ + G + L q + L g (2.1) Σ valence sea G L q L g valence sea Σ Σ u v + d v + u s + d s + s s + ū s + d s + s s (2.2) u v d v valence u s ū s d s d s s s s s sea s 2.2 s
8 s (Z 0 ) g 2 J µ ν J n µ 4M 2 Z cos2 θ W = G F 2J µ ν (V n µ A n µ) (2.3) g J ν µ J µ n Vµ n A n µ M Z Z θ W G F Q 2 M Z g2 4MZ 2 cos2 θ W J ν µ J µ ν = 1 2 ψ ν (1 γ 5 )ψ ν (2.4) Q 2 M Z V µ n An µ V µ n = 1 2 (1 8 3 sin2 θ W ) ψ u γ µ )ψ u 1 2 (1 4 3 sin2 θ W )( ψ d γ µ ψ d + ψ s γ µ ψ s ) (2.5) A µ n = 1 2 ( ψ u γ µ γ 5 ψ u ψ d γ µ γ 5 ψ d ψ s γ µ γ 5 ψ s ) (2.6) < p(p ) A µ p(p ) > = ū p (P γ 5 u + dγ µ γ 5 d + sγ µ γ 5 s )[ūγµ ]u p (P ) (2.7) 2 = ū p (P )[G A (Q 2 )γ µ γ 5 τ z + G p(q 2 ) 2M qµ γ 5 ]u p (P ) (2.8) ( ) τ = 1( 1) M q 4 q = P P p p 4 Q Q 2 = q 2 G A (Q 2 ) G A (Q 2 ) = G 3 A(Q 2 ) 1 2 Gs A(Q 2 ) (2.9) G 3 A (Q2 ) G s A (Q2 ) G p (Q 2 ) G A (Q 2 ) G 3 A (Q2 ) G s A (Q2 ) G 3 A(Q 2 ) = ūγµ γ 5 u dγ µ γ 5 d 2 (2.) G s A(Q 2 ) = sγ µ γ 5 s (2.11) 5
9 dσ dq = G2 F Q2 (A ± BW + CW 2 ) (2.12) 2 2πEν 2 W = 4E ν M n +(-) ( ) E ν M n A B C A = 1 4 G2 A(1 + τ) (F 2 1 τf 2 1 )(1 τ) + 4τF 1 F 2 (2.13) B = 1 4 G A(F 1 + F 2 ) (2.14) C = 1 Mn 2 16 Q 2 (G2 A + F1 2 + τf2 2 ) (2.15) F 1 F 2 G A dσ dq 2 G2 A (2.16) G 3 A (0) s [2] s (J-PARC: 2.1) 1GeV 50MeV ( 2.2) 3 FiNeSSE ( 2.3) 6
10 2.1: J-PARC 2.2: FiNeSSE ( ) µ [1] 7
11 2.3: 3 [1] 8
12 KeV β π µ τ 5ππ 0 ( m 2 = m 2 1 m 2 2 ) (sin 2 2θ) 2 ν e ν µ P (ν e ν µ ) = sin 2 2θ sin 2 (1.27 m 2 L E ) L E m 2 E L µ ν µ ν ν e [4] 9
13 3.1: [4] pp p + p d + e + + ν e pep p + p + e d + ν e 7 Be 7 Be 8 B 8 B ν e (ν e ) 3.1 SAGE GALLEX 1/3 1/2 pp 60 7 Be 0 7 Be 8 B 50 [4] 90 U Th 12 W 40 U Th U Th [4] ( 3.1) 00m 3 ( 6,200m 3 ) ( 3,000m 3 )
![3.1: [5] ( 1,200m 3 ) 20 1,280 17 20 642 36 0.](/docs-images/95/123232990/images/14-0.jpg "5 1,200m 3 / ( ) :80 :20 PPO:1.")
14 3.1: [5] ( 1,200m 3 ) 20 1, ,200m 3 / ( ) :80 :20 PPO:1.5g/l 50 1MeV 190 σ(e)/e = 8 γ 2 11
15 20 1MeV nm m 30m [4] ν e β ( ν e +p e + +n) (n + p d + γ) γ (2.2 MeV) ν e [4] 7 Be (ν e + e ν e + e ) ν e 7 Be 861 KeV T 2E2 ν 2E ν+m e, T max = 665 KeV [4] U Th U Th ν e + p e + + n 1.8 MeV ν e U Th β [4] 12
![3.2 K2K SciBar ( 3.2) 3.2: K2K [3] 3.2.1 K2K 3.2.2 SciBar 3.3 1.3cm 2.](/docs-images/95/123232990/images/16-0.jpg "5cm 300cm 1kg 116 1 1.3cm 290cm 300cm 2 X Y 1 64 SciBar 290cm 290cm 166.")
16 3.2 K2K SciBar ( 3.2) 3.2: K2K [3] K2K SciBar cm 2.5cm 300cm 1kg cm 290cm 300cm 2 X Y 1 64 SciBar 290cm 290cm 166.4cm 20 cm [3] 13
![3.3: scibar [3] MINOS PPO POPOP 1 0.03 1 1 250µm 1.](/docs-images/95/123232990/images/17-0.jpg "8mm [3] (WLS-fiber) WLS-fiber Y11 1.")
17 3.3: scibar [3] MINOS PPO POPOP µm 1.8mm [3] (WLS-fiber) WLS-fiber Y11 1.5mm 64 [3] (H8804) H mm 2 64 (8 8) 0 m ( ) 4 [3] 14
18 3.2.3 : ν µ + n µ + p 1π : ν µ + p µ + π + + p : ν µ + p ν µ + p π 0 : ν µ + n ν µ + π 0 + n [3] 15
19 4 4.1 ( ) ( 1 s 1ns) (fluorescence) (phosphorescence) 8 ( 4.1) N(t) = N 0 exp( t τ d ) (4.1) N t N 0 t = 0 τ d 1/e 2 ( 4.2) N(t) = A exp( t τ f ) + B exp( t τ s ) (4.2) 16
20 4.1: [6] τ f τ s A B t = 0 4.2: 2 (fast component) (slow component) 2 [6] ( ) 17
21 ( 4.4) ( 4.2) ( 4.1) ( 4.4) ( 4.3) 6 18
22 4.1: (ρ) (n) (I 0 ) (τ(ns)) (λ(nm)) H/C(1 ) [6] ρ n ( ) I( ) τ(ns) λ(nm) H/C NE 2A α β γ NE NE 4B BBQ NE NE α β γ NE111A NE α β γ NE Pilot U Pilot
23 4.2: (ρ) (n) ( ) (I 0 ) (τ(ns)) (λ(nm)) H/C(1 ) [6] ρ n ( ) I( ) τ(ns) λ(nm) H/C NE NE α β NE O: NE221( ) α β NE γ NE γ NE NE D: NE D: NE α β NE NE O: NE A B: β NE Gd: NE Sn: γ X NE Gd:
24 4.3: (ρ) (n) ( ) (I 0 ) (τ(ns)) (λ(nm)) [6] ρ n ( ) I( ) τ(ns) λ(nm) NE ( 6 Li-ZnS(Ag)) Li:5 NE451(ZnS(Ag) ) NE Li:2.3 β NE Li:6.6 NE Li:7.5 NE Li:7.7 β 21
25 4.4: (ρ) (n) ( ) (I 0 ) (τ(ns)) (λ(nm)) H/C(1 ) [6] ρ n ( ) I τ(ns) λ(nm) H/C γ α β γ NaI(Tl) γ X NaI γ X LiI(Eu) CsI(TI) γ CsI(Na) γ CsI γ( ) CaF2(Eu) β X CaWO γ ZnS(Ag) α ZnO(Ga) α 22
26 ( ) 4.3: (15) (1-12) [7] ( ) Na K Ca 4 23
27 : ( ) (λ) (η q ) [7] ns A 24
28 4.5: (λ) (λ max ) λ max (η q (λ max )) [7] λ(nm) λ max (nm) η q (λ max ) AgOCs BiAgOCs Cs 3 Sb-O Na 2 KSb-Cs K 2 CsSb BeO MgOCs V 0 200eV C 5ns 1 50Ω 200mV 2ns 4.3 π (π ) π 4.5 π S 0 S 1 S T 0 T 1 T S 0 S ev π ( 2 ) 0.15 ev (0.025 ev) S 00 π 25
29 4.5 1 ps S 1 S 11 S 12 π S 1 3 T 1 S T 1 S 1 T 1 π S 1 4.5: π S 1 T 1 π S 1 T 1 [7]
30 [7] polyvinyltoluene polyphenylbenzene polystyrene PDB p-terphenyl PBO POPOP g/l ( 4.6) 23ns N(t) = f(σ, t) exp( t τ ) (4.3) f(σ, t) f(σ, t) = exp (t t 0 ) 2 2σ 2 σ σ τ : σ τ [6] σ(ns) τ(ns) NE Naton NE2A
31 4.6: NE2A NE1 420nm 430nm NE4 PILOT U 400nm 390nm [6] 28
32 g/cm π π 4.7 PPO o- m- p- m- p- 29
33 4.7: ( ) (PPO) [9] 4.7: λ absorb max λ emit max λemit mean [9] λ absorb max (nm) λ emit max(nm) λ emit mean(nm) : [9] 30
34 1 1 = (4.4) ( 4.9) ( 4.14) BBOT bulty-pbd bismsb 1 PPO bulty-pbd DMPO-POP bis-msb 1 Cs-Sb (S-11 S-13) 420nm ( 4.9) PPO 360nm 360nm 4.8 PPO butyl-pbd PBD PBD butyl butyl-pbd butyl-pbd PPO 31
35 4.9: (S-13) (S-11) 1 (PPO) (DMPOPOP) [9] 4.8: (τ) λ absorb max λemit max λemit mean (η) (c(g/l)) ( ) [9] λ absorb max (nm) λ emit max(nm) λ emit mean(nm) τ η c(g/l) ( ) PPO butyl-pdb DMPOPOP Bis-MSB
36 DMPOPOP Bis-MSB DMPOPOP : 1 [9] ( ) ( ) ( ) ( ) 33
37 ( 4.11) : β A B C [9] 34
38 : [9] - PPO PPO PPO PPO ( 4.13) 35
39 4.13: [9] PPO (21 ) ( 4.9) - ( 4.) 36
40 4.9: [9] ppm(w/w) ( 4.14) 4.14: PPO PPO [9]
41 NaI(Tl) CsI(Tl) (Tl) CsF 2 CsI(Tl) CsI(Na) Kl(Tl) LiI(Eu) Bi 4 Ge 3 O 12 BaF 2 ZnS(Ga) CaW 4 ( 4.15) 4.15: [7] ( ) ns ( CsF 2 5ns ) 1 2 NaI CsF 2 LiI(Eu) Kl(Tl) Bi 4 Ge 3 O 12 BaF 2 CsI(Tl) ( ) NaI Bi 4 Ge 3 O 12 BaF 2 38
42 4.16: NaI CsI BGO S-2 [6] 4.5 1ns dipheylstilbene(dps) 4.6 γ 20 30ns
43 5 [] 5.1 (vial, 50ml) (PMT) vial vial PMT 5.1 PMT 1250V PMT(H3171XB) (amp) (discrim.) NIM ADC output register (CC/NET) CAMAC PMT amp discrim. ( -17.5mv) amp 2 (divider) (signal) gate generator(gate 40
44 5.1: 41
45 5.2: 5.1: BICRON BC-630 vial SV-50M PMT H3171XB ADC LeCroy 2249W discrim. LeCroy 4608C gate generator PHILIPS SCIENTIFIC 7194 CC/NET CC/NET 5.3: PMT(H3171XB) 400nm ( ) 42
46 図 5.4: PMT(H3171XB) の電圧とゲインの関係を示す (浜松ホトニクス ゲイン 特性) 43
47 5.2: 60 Co 2057( ) (0KBq) Bq 5.27( ) g.) (gate) ADC 0ns ADC ADC 6µs ADC ADC discrim. gate generator discrim. VETO VETO discrim. gate generator ADC ADC CC/NET output register output register discrim. VETO (reset) gate generator discrim. ( 60 Co) Bq vial γ γ (I) (I 0 ) I = I 0 exp x l (5.1) l I 0 I 0 γ l 32cm exp vial 0.1cm γ 30 (1800s) 44
48 2.5kHz µs m = R 1 Rτ (5.2) m R τ Rτ 0.25 m R 60 Co γ 60 Co ADC ( 5.5 ADC 60 ) ( 5.6) count 5 60 Co+bg. bg pedestal channel 5.5: 60 Co ADC 60 Co ADC ADC
49 count channel 5.6: 60 Co ADC pedestal 5.3: (ml) (g) (g) (g) (50) Na(11) PPO(0.7) (50) Na(11) PPO(0.7) BisMSB(0.005) (50) Na(11) PPO(0.7) (50) Na(11) PPO(0.7) BisMSB(0.005) PPO BisMSB 8 46
50 count 5 without BisMSB with BisMSB channel 5.7: BisMSB BisMSB BisMSB 5.4: BisMSB count rate(hz) BisMSB 20 BisMSB 1900 BisMSB 2300 BisMSB 2000 BisMSB BisMSB BisMSB 5.9 BisMSB 5. BisMSB 47
51 count 5 without BisMSB witht BisMSB channel 5.8: BisMSB BisMSB BisMSB count 5 water heavy water channel 5.9: BisMSB 48
52 count 5 water heavy water channel 5.: BisMSB BisMSB 0.1g/l : PPO 5g/l BisMSB 0.1g/l PMT ADC ( 5.1) amp BisMSB 49
53 amp count 5 water organic channel 5.11: 5.6: count rate(hz) WLS-fiber (WLS-fiber) PMT WLS-fiber WLS-fiber Co vial 0.1cm 50
54 2 γ WLS-fiber BisMSB WLS-fiber PMT WLS-fiber Crarey Y11(φ1.5mm) BisMSB WLS-fiber vial PMT PMT WLS-fiber WLS-fiber WLS-fiber 1 WLS-fiber WLSfiber WLS-fiber 0.3 BisMSB WLS-fiber 5.16 m vial [] cm vial PPO WLS-fiber WLS-fiber
55 5.12: WLS-fiber 52
56 5.13: BisMSB ( ) ( ) [12] 5.14: WLS-fiber(Y-11) ( ) ( ) (KURARAY SCINTILLATION MATERIALS) 53
57 count 5 direct WLS-fiber channel 5.15: WLS-fiber WLS-fiber count 5 direct WLS-fiber channel 5.16: BisMSB WLS-fiber WLS-fiber 54
58 (50ml) (Na11g) PPO(0.7g) count 5 4 2day 8day 27day 35day channel 5.17: γ 2 60 Co γ ( 5.20) γ 137 Cs
59 count 2day 8day 27day 35day channel 5.18: count 4 2day 8day 27day 35day channel 5.19:
60 5.20: γ [11] 5 60 Co Cs count channel 5.21: 60 Co 137 Cs 57
61 137 Cs γ 60 Co γ 137 Cs γ (E) 2α cos 2 φ E = hν (1 + α) 2 α 2 cos 2 φ (5.3) 60 Co γ discrim. hν γ α hν m e c 2 m e A exp ax +B exp (x b)2 2c 2 (5.4) fitting A B a b c b a 5.22 ( ) : 2 p0 p1 p2 p3 p4 p5 A a B b c
62 5.7: (day) ± ± ± ± ± ± ± : (day) ± ± ± ± ± ± ± position day 5.23: 59
63 slope day 5.24: 5.25 counts day 5.25:
64 6 6.1 s (WLS-fibner) 3 (PPO PPO (BisMSB)) WLS-fiber (PMT) WLS-fibner PMT BisMSB A exp ax +B exp (x b)2 2c 2 A B a b c
65 27 (35 ) WLS-fiber 1 WLS-fiber 700MeV 62
66 A Appendix A.1 A.1.1 A.1 A.2 A.3 A.4 A.1 BisMSB A.2 BisMSB A.3 BisMSB A.4 BisMSB Tektronix TDS3054B A.1: BisMSB A Co ADC ADC ADC 63
67 A.2: BisMSB A.3: BisMSB 64
68 A.4: BisMSB BisMSB ADC BisMSB ADC A.5 A.6 BisMSB ADC BisMSB ADC A.7 A.8 WLS-fiber BisMSB ADC BisMSB ADC A.9 A. BisMSB ADC BisMSB ADC A.11 A.12 A.2 1 A.13 2day 8day 65
69 count 5 60 Co nosource pedestal channel A.5: BisMSB ADC 60 Co ADC ADC count 5 60 Co nosource pedestal channel A.6: BisMSB ADC 60 Co ADC ADC 66
70 count 5 60 Co nosurce pedestal channel A.7: BisMSB ADC 60 Co ADC ADC count 5 60 Co nosource pedestal channel A.8: BisMSB ADC 60 Co ADC ADC 67
71 count 5 60 Co nosource pedestal channel A.9: WLS-fiber BisMSB ADC 60 Co ADC ADC count 5 60 Co nosource pedestal channel A.: WLS-fiber BisMSB ADC 60 Co ADC ADC 68
72 count 5 60 Co nosource pedestal channel A.11: WLS-fiber BisMSB ADC 60 Co ADC ADC count 5 60 Co nosource pedestal channel A.12: WLS-fiber BisMSB ADC 60 Co ADC ADC 69
73 2days count 60 Co nosource channel 8days 14days channel count 60 Co channel count 60 Co nosource nosource 21days channel count 24days channel 60 Co nosource count 60 Co nosource 1 27days 30days channel count 60 Co channel count 60 Co nosource nosource channel count A.13: 35days 60 Co nosource
74 [1] L. Bugel et al. [FINeSSE Collaboration], A proposal for a near detector experiment on the booster neutrino beamline: FINeSSE: Fermilab Intense Neutrino Scattering Scintillator Experiment, arxiv:hep-ex/ [2] A. W. Thomas, W. Weise, The Structure Of The Nucleon, Vch Verlagsgesellschaft Mbh (2001). [3], K2K-SciBar 22 (2004). [4], KamLAND, 55 (2000). [5], Measurement of Reactor Anti-Neutrino Disapperance in kam- LAND, (2003). [6] William R. Leo, Techniques for Nuclear and Particle Physicsa Experiments: A How-To Approach, Springer-Verlag (1994). [7] Glenn F. Knoll, 3, (2001). [8] K. Kleinknecht, 2, (1987). [9],, (1992). [], (2003). [11], 2 3, (2003). [12] Elisa Resconi, Optical Studies of Wave Lenght Shifters, 71
75 2 72
Mｏｔｔ散乱によるParity対称性の破れを検証
Mott Parity P2 Mott target Mott Parity Parity Γ = 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 t P P ),,, ( 3 2 1 0 1 γ γ γ γ γ γ ν ν µ µ = = Γ 1 : : : Γ P P P P x x P ν ν µ µ vector axial vector ν ν µ µ γ γ Γ ν γ
23 1 Section ( ) ( ) ( 46 ) , 238( 235,238 U) 232( 232 Th) 40( 40 K, % ) (Rn) (Ra). 7( 7 Be) 14( 14 C) 22( 22 Na) (1 ) (2 ) 1 µ 2 4
23 1 Section 1.1 1 ( ) ( ) ( 46 ) 2 3 235, 238( 235,238 U) 232( 232 Th) 40( 40 K, 0.0118% ) (Rn) (Ra). 7( 7 Be) 14( 14 C) 22( 22 Na) (1 ) (2 ) 1 µ 2 4 2 ( )2 4( 4 He) 12 3 16 12 56( 56 Fe) 4 56( 56 Ni)
2005 4 18 3 31 1 1 8 1.1.................................. 8 1.2............................... 8 1.3.......................... 8 1.4.............................. 9 1.5.............................. 9
Drift Chamber
Quench Gas Drift Chamber 23 25 1 2 5 2.1 Drift Chamber.............................................. 5 2.2.............................................. 6 2.2.1..............................................
Muon Muon Muon lif
2005 2005 3 23 1 2 2 2 2.1 Muon.......................................... 2 2.2 Muon........................... 2 2.3................................. 3 2.4 Muon life time.........................................
24 10 10 1 2 1.1............................ 2 2 3 3 8 3.1............................ 8 3.2............................ 8 3.3.............................. 11 3.4........................ 12 3.5.........................
KamLAND (µ) ν e RSFP + ν e RSFP(Resonant Spin Flavor Precession) ν e RSFP 1. ν e ν µ ν e RSFP.ν e νµ ν e νe µ KamLAND νe KamLAND (ʼ4). kton-day 8.3 < E ν < 14.8 MeV candidates Φ(νe) < 37 cm - s -1 P(νe
positron 1930 Dirac 1933 Anderson m 22Na(hl=2.6years), 58Co(hl=71days), 64Cu(hl=12hour) 68Ge(hl=288days) MeV : thermalization m psec 100
positron 1930 Dirac 1933 Anderson m 22Na(hl=2.6years), 58Co(hl=71days), 64Cu(hl=12hour) 68Ge(hl=288days) 0.5 1.5MeV : thermalization 10 100 m psec 100psec nsec E total = 2mc 2 + E e + + E e Ee+ Ee-c mc
25 3 4
25 3 4 1 µ e + ν e +ν µ µ + e + +ν e + ν µ e e + TAC START STOP START veto START (2.04 ± 0.18)µs 1/2 STOP (2.09 ± 0.11)µs 1/8 G F /( c) 3 (1.21±0.09) 5 /GeV 2 (1.19±0.05) 5 /GeV 2 Weinberg θ W sin θ W
main.dvi
MICE Sci-Fi 2 15 3 7 1 1 5 1.1 MICE(Muon Ionization Cooling Experiment)............. 5 1.1.1........................... 5 1.1.2............................... 7 1.1.3 MICE.......................... 10
soturon.dvi
Stopped Muon 94S2003J 11 3 10 1 2 2 3 2.1 Muon : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 3 2.2 : : : : : : : : 4 2.3 : : : : : : : : : : : : : 6 3 7 3.1 : : : : : : : : : : : : : : : :
thesis.dvi
3 17 03SA210A 2005 3 1 introduction 1 1.1 Positronium............ 1 1.2 Positronium....................... 4 1.2.1 moderation....................... 5 1.2.2..................... 6 1.2.3...................
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BELLE TOP 12 1 3 2 BELLE 4 2.1 BELLE........................... 4 2.1.1......................... 4 2.1.2 B B........................ 7 2.1.3 B CP............... 8 2.2 BELLE...................... 9 2.3
(e ) (µ ) (τ ) ( (ν e,e ) e- (ν µ,µ ) µ- (ν τ,τ ) τ- ) ( ) ( ) ( ) (SU(2) ) (W +,Z 0,W ) * 1) [ ] [ ] [ ] ν e ν µ ν τ e µ τ, e R,µ R,τ R (2.1a
![(e ) (µ ) (τ ) ( (ν e,e ) e- (ν µ,µ ) µ- (ν τ,τ ) τ- ) ( ) ( ) ( ) (SU(2) ) (W +,Z 0,W ) * 1) [ ] [ ] [ ] ν e ν µ ν τ e µ τ, e R,µ R,τ R (2.1a](/thumbs/100/144882653.jpg "(e ) (µ ) (τ ) ( (ν e,e ) e- (ν µ,µ ) µ- (ν τ,τ ) τ- ) ( ) ( ) ( ) (SU(2) ) (W +,Z 0,W ) * 1) [ ] [ ] [ ] ν e ν µ ν τ e µ τ, e R,µ R,τ R (2.1a")
1 2 2.1 (e ) (µ ) (τ ) ( (ν e,e ) e- (ν µ,µ ) µ- (ν τ,τ ) τ- ) ( ) ( ) ( ) (SU(2) ) (W +,Z 0,W ) * 1) [ ] [ ] [ ] ν e ν µ ν τ e µ τ, e R,µ R,τ R (2.1a) L ( ) ) * 2) W Z 1/2 ( - ) d u + e + ν e 1 1 0 0
21 Daya Bay θ 13 Lawrence Berkeley National Laboratory Brookhaven National Laboratory 2012 ( 24 ) Daya Bay 2011
21 Daya Bay θ 13 Lawrence Berkeley National Laboratory YNakajima@lbl.gov Brookhaven National Laboratory thide@bnl.gov 2012 ( 24 ) 5 16 1 Daya Bay 2011 12,, θ 13, 55 2012 3 sin 2 2θ 13 Daya Bay sin 2 2θ
( ) Note (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
![( ) Note (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](/thumbs/98/136160482.jpg "( ) Note (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")
( ) 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 ( - )
(1.2) T D = 0 T = D = 30 kn 1.2 (1.4) 2F W = 0 F = W/2 = 300 kn/2 = 150 kn 1.3 (1.9) R = W 1 + W 2 = = 1100 N. (1.9) W 2 b W 1 a = 0
1 1 1.1 1.) T D = T = D = kn 1. 1.4) F W = F = W/ = kn/ = 15 kn 1. 1.9) R = W 1 + W = 6 + 5 = 11 N. 1.9) W b W 1 a = a = W /W 1 )b = 5/6) = 5 cm 1.4 AB AC P 1, P x, y x, y y x 1.4.) P sin 6 + P 1 sin 45
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masato@icrr.u-tokyo.ac.jp 996 Start 997 998 999 000 00 00 003 004 005 006 007 008 SK-I Accident Partial Reconstruction SK-II Full reconstruction ( SK-III ( ),46 (40%) 5,8 (9%),9 (40%) 5MeV 7MeV 4MeV(plan)
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