The CNGS beam CERN SPS 17 Ge V

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The CNGS beam CERN SPS νμ ニュートリノエネルギー:平均17 Ge. V 73 0 k m ντ

The CNGS beam CERN SPS νμ ニュートリノエネルギー:平均17 Ge. V 73 0 k m ντ Appearance ? 10 in 5 years? INFN Gran Sasso Institute

pot 1. 782 E 19 pot 3/11 8: 00 1. 782 E 19 pot

pot 1. 782 E 19 pot 3/11 8: 00 1. 782 E 19 pot 2008年: 6月~ 11月 1. 782× 10^19 pot Horns filters 19 -20/10 18 KV cable accident 25/7 Beam loss, vacuum accident 27/6 -2/7 Wed 18/6 17: 00 Start of commissioning at low intensity 6 -8/10 MD CNGS quadrupole 14 -17/9 10/7 -18/7 Earth fault on the PS magnet Horn + PS vacuum Week 1/9 PS septum + Long MD 8 -14/8 Long MD stop + MTE kicker problem 7/7 6: 00 – 10/7 12: 00 Unix Time

2009年: 5月~ 11月  3. 522× 10^19 pot

2009年: 5月~ 11月  3. 522× 10^19 pot

2008 2009 2010(予定) pot (× 10^19) 1. 78 3. 52 4. 5 event 1600

2008 2009 2010(予定) pot (× 10^19) 1. 78 3. 52 4. 5 event 1600 3200 4100 イベント配分 日本 : ヨーロッパ = 1 : 1

Tono Mine Scanning Lab

Tono Mine Scanning Lab

The OPERA Detector @ Gran Sasso, Italy (1400 m underground)

The OPERA Detector @ Gran Sasso, Italy (1400 m underground)

The OPERA Film The OPERA film π-10 Ge. V/c

The OPERA Film The OPERA film π-10 Ge. V/c

OPERA主検出器 ECC (Emulsion Cloud Chamber) 75. 4 mm OPERA Film (before development) 125 mm 8.

OPERA主検出器 ECC (Emulsion Cloud Chamber) 75. 4 mm OPERA Film (before development) 125 mm 8. 3 kg 10 X 0 Neutrino Beam 100 mm Lead plate : 1 mm 0. 3 mm OPERA Film Lead plate 57 emulsion films (tracking device) 56 Lead plates (target) piled up.

Tau Neutrino Interaction Detected In ECC by DONUT exp.

Tau Neutrino Interaction Detected In ECC by DONUT exp.

The OPERA Detector Super Module 1 Target section Super Module 2 Muon spectrometer Target

The OPERA Detector Super Module 1 Target section Super Module 2 Muon spectrometer Target section Muon spectrometer 1. 25 ktonのターゲット 15万個のECC

The OPERA Detector Super Module 1 Target section Super Module 2 Muon spectrometer Target

The OPERA Detector Super Module 1 Target section Super Module 2 Muon spectrometer Target section Muon spectrometer Brick Manipulator System 1. 25 ktonのターゲット 15万個のECC

The OPERA Detector ν TT 2. 6 cm 10 cm ECC 12. 5 cm

The OPERA Detector ν TT 2. 6 cm 10 cm ECC 12. 5 cm Changeable Sheet (CS)

Examples of Neutrino Event

Examples of Neutrino Event

Examples of Neutrino Event ν ECC

Examples of Neutrino Event ν ECC

Examples of Neutrino Event

Examples of Neutrino Event

Examples of Neutrino Event

Examples of Neutrino Event

The Changeable Sheet (CS) 乳剤層が4層 OPERA film x 2 OPERA film Base 205 micron

The Changeable Sheet (CS) 乳剤層が4層 OPERA film x 2 OPERA film Base 205 micron Neutrino beam Base 205 micron 10 cm 12. 5 cm Emulsion layers 44 micron X Z

Flow of analysis

Flow of analysis

Flow of analysis ν ECC CS CS Development →Scanning

Flow of analysis ν ECC CS CS Development →Scanning

CS scanning with S-UTS @ Tono Now 5 S-UTS are working. 10 event /

CS scanning with S-UTS @ Tono Now 5 S-UTS are working. 10 event / day SutsでCSすきゃん

SUTS Scanning DATA 10 cm 1層あたりTotal ~ 140 M tracks → 4層のコインシデンスを取る 12. 5

SUTS Scanning DATA 10 cm 1層あたりTotal ~ 140 M tracks → 4層のコインシデンスを取る 12. 5 cm

9165038610 12171 16 9165038610 44064 16 9165038610 11224 16 -1 -1 -1 5 6

9165038610 12171 16 9165038610 44064 16 9165038610 11224 16 -1 -1 -1 5 6 6 12 13 12

'08 RUN '09 RUN

'08 RUN '09 RUN

CS status (Japan) 2008 2009 total expected ~800 ~1600 ~2400 assign 804 1319 2123

CS status (Japan) 2008 2009 total expected ~800 ~1600 ~2400 assign 804 1319 2123 CS try 756 1120 1876 CS found 581 781 1362

Neutrino beam (CERN SPS) ντ シミュレーション

Neutrino beam (CERN SPS) ντ シミュレーション

ντ反応 Decay mode Branchi ng (%) τ検出効 率(%) εdecay (%) B. G. (/ντ反 応候補)

ντ反応 Decay mode Branchi ng (%) τ検出効 率(%) εdecay (%) B. G. (/ντ反 応候補) e 18 43 8 0. 02 17 28 5 0. 01 h 49 9 4 0. 02 Trident 3 h (h h h) 15 study 計 ------------ 100 ----- 17 0. 05 Kink Δm 2 振動確率 (%) ν反応数/ντ反応 (※) Kamiokande 1. 0× 10 -2 26. 9 80 SK (1998) 3. 0× 10 -3 2. 7 800 SK (2004) 2. 4× 10 -3 1. 7 1300 ※ 1/εdecay/Posc/(σντCC/σνμCC)×(νμint)/(νμCCint)

Event scanned = 836 Event found = 681 Events assigned to UE: 876 (685

Event scanned = 836 Event found = 681 Events assigned to UE: 876 (685 CC + 191 NC) • 1272 CS-doublets ( 1. 45 brick/event)

Event scanned = 1085 Event found = 552 Events assigned to UE: 1445 (1052

Event scanned = 1085 Event found = 552 Events assigned to UE: 1445 (1052 CC + 393 NC) • 1712 CS-doublets ( 1. 18 brick/event) The follow-up of 2009 run is going smoothly in parallel with 2008 event tail

CS status 2008 2009 total expected ~800 ~1600 ~2400 assign 804 1319 2123 CS

CS status 2008 2009 total expected ~800 ~1600 ~2400 assign 804 1319 2123 CS try 756 1120 1876 CS found 581 781 1362 756 -581=175 ・Emulsion trouble : 64 → special analysis ・CS analysis : 111 → ~50 ev CS found

CS found (expected) 2008 2009 total assign ~800(804) ~1600(1319) ~2400(2123) CS found ~670(581) ~1360(781)

CS found (expected) 2008 2009 total assign ~800(804) ~1600(1319) ~2400(2123) CS found ~670(581) ~1360(781) ~2030(1362) EM trouble : 91% ('08), 93% ('09) × finding ratio (1 st. CS ~ 3 rd. CS) : 91% = 83%('08), 85%('09)

red : 09 RUN black: 08 RUN AV 9  days AV 55 days

red : 09 RUN black: 08 RUN AV 9  days AV 55 days

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

26 mm ECC 100 mm CS TT

Z Ev: 227754632 (NC) Y

Z Ev: 227754632 (NC) Y

Principle of detecting tau neutrino Topology cτ = 87 micron - - , e-

Principle of detecting tau neutrino Topology cτ = 87 micron - - , e- , h- h h Tau life time short impact parameter to vertex is small nuclear emulsion (sub um resolution) Feature of neutrino tau event Decay search Nonoyama’s talk -No lepton except tau at 1 ry vertex -A decay candidate consistent with tau