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Status of Located Event Analysis
On behalf of Nagoya Scanning Group
Umut KOSE
OPERA Emulsion Workshop, 22-23 January 2008, Nagoya, JAPAN
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• 38 Opera neutrino events 19 (EU), 19 (JP)• 19 events 15 CC + 4 NC events in Japan• 7 events analyzed.
Event Brick# Event type Stop Plate
179264151 20122 CC PL10
180277945 33540 CC PL56
178684089 36564 NC PL38
179351516 01429 CC PL47
181543007 53486 CC PL25
182245114 40953 CC PL46
187381090 40742 CC PL54
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Event Event type Stop Plate 1ry comment
179264151 CC PL10 5 e-pair, charm!!
180277945 CC PL56 3; 1 black 2 e-pairs
178684089 NC PL38 6
179351516 CC PL47 3
181543007 CC PL25 7 e-pair,
Neutral 2ndry?
182245114 CC PL46 3; 5 black
187381090 CC PL54 Single stop QE-like!!
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CC-eventBrick #: 53486 Event 18154300
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Ev18154300 Brick#53486
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Ev18154300 Brick#53486
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Ev18154300 Brick#53486
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Ev18154300 Brick#53486
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Event 181543007 1st brick 0.98SM Wall, side, row, cell 1 20 1 46 17Brick N., status 1053486 0Kalman: slopes X,Y -0.26779601 -0.381244987K: Extrapolation 119.332855 98.674118 -521.834045K: dist. from borders evt x,y mm class 181543007 39.484375 38.375 3K: Coordinates in emu. frame x,y mm 39.484375 61.4248047Linear slopes X,Y -0.265368491 -0.340315163Linear extrap X,Y,Z 118.968155 97.4809113 -521.834045Linear coordinates in emu. frame x,y mm 35.8374023 49.4926758
Ev18154300 Brick#53486
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Large scanning Area (122mm x 95.5mm)
And no angular selection
4 hold selection and 8 tracks sent to manual check
and found 6 tracks.
Found Tracks angle and position
1) (-0.116, -0.476) (33.0 , 74.0)
2) (-0.171, -0.188) (31.3 , 84.6 )
3) ( 0.186, 0.057) (40.3 , 94.2)
4) ( 0.608, -0.088) (45.1 , 92.0)
5) ( 0.604, 0.133) (54.4 , 92.6 )
1 track isolated
6) (-0.373, 0.441) (59.7 , 21.1 ) cosmic ray?
Ev18154300 Brick#53486
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Ev18154300 Brick#53486
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Ev181543007 Brick#53486
Ev18154300 Brick#53486
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Ev18154300 Brick#53486
58 emulsion films have been found
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ScanBack location resultEv18154300 Brick#53486
SB location 2 times tried, in the first trial SB stopped at pl 25 in the second stopped at pl 51.
15Z-projection
Ev18154300 Brick#53486
X-projection
Y-projection
muon
NetScan Data Analysis
at stopping plate 25
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• 8 tracks sent to manual scan (9 tracks found at 1ry)25 -0.1293 -0.2064 36054.0 90855.3 ---25 -0.1023 -0.4940 36069.7 90706.7 1.7225 0.0504 0.1043 36133.5 90999.6 3.4325 -0.2856 0.2756 35969.7 91099.9 4.6625 -0.2047 -0.6125 36016.2 90646.5 0.9525 0.1440 0.6340 36187.4 91272.1 2.0425 0.0011 -0.0251 36109.0 90944.9 }-->epair*25 -0.0003 0.0174 36107.2 90950.1 }-->epair*25 0.0585 0.0980 36133.1 91002.123 0.4242 -0.0414 37471.3 90591.6*found during manual scan..
Ev18154300 Brick#53486
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• 8 tracks have been sent to manual scan (plate 25 in lead), 9 tracks have been found at 1ry vertex
1ry vertex positons:36119.9 90966.1 517.3
e-pair ..36107.7 90957.6 132.0
FL = 385.6 micron, Opening angle: 0.044rad.One more neutral 2ndry at plate 23 ???FL ~ 3100micron, parent slope: (0.430;-0.120)
Ev18154300 Brick#53486
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Pl 11; 2ndry interaction with 3 black, 1shower track, shower found in CSD
Edge out in pl 3 Muon track
Found in CSD
Exist in CSD
Ev18154300 Brick#53486
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Ev18154300 Brick#53486
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Ev18154300 Brick#53486
SB first trial
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Ev18154300 Brick#53486
SB second trial
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• Checking SB track and follow down track at pl2 and 1.
pl2
106177 -0.1634 -0.1805
B 210085 -0.1540 -0.1806 31845.7 85522.3
M 320000 -0.1692 -0.1907 31840.7 85521.4
71136 -0.1634 -0.1298
M 320000 -0.1886 -0.1760 31670.8 85736.4
pl1
106177 -0.1634 -0.1805
M 320000 -0.1733 -0.1980 31786.3 85524.4
71136 -0.1886 -0.1760
M 320000 -0.1905 -0.1799 31613.0 85745.4
Base --> dx: 169.9 ; dy: -215.0
Up --> dx: 168.0 ; dy: -214.5
Down --> dx: 163.0 ; dy: -210.6
SB > 937581 2 125813 -0.179853 -0.167776 31681.9 85724.7 220079 110052 110027 -0.2254 -0.2368 -0.2039 -0.2063
Follow > 937601 2 78441 -0.166576 -0.186486 31851 85514.5 180051 80011 100040 -0.1648 -0.2444 -0.1951 -0.2328
SB > 778196 1 71136 -0.1827 -0.1697 31628.4 85694.9 210099 110064 100035 -0.1831 -0.2505 -0.2083 -0.2318
Ev18154300 Brick#53486
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Checking plate 51 again
The Scanback Track penetrating
Ev18154300 Brick#53486
Cosmic !!!
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CC-eventBrick #: 20122
Event 17926415
25
23.2 GeV/c
2470 tot pe654.7 mu pe
Ev179264151 Brick#20122
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Ev179264151 Brick#20122
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PWall4>83%
Ev179264151 Brick#20122
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RS, Wall 4, Tray 17 Cell 25 prob= 0.83RS, Wall 5 Tray 17 Cell25 prob= 0.17
Kalman slopes:-0.111 0.111Linearfit slopes:-0.109 0.105 Emu coordinates:X 4.3018 Y 8.29335
Ev179264151 Brick#20122
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CS scan and SBScanning Area (40mm x32mm) and (122mm x 95.5mm)
CS fog density: 6.1+-0.4 (ESS measurement)
4 hold selection
Prediction angle: (-0.109, 0.105)Predicted film position: (36.3, 83.0) mm
Found Track angle and position
Difference from prediction angle: -0.006, -0.001
Difference from prediction positions: (17.3, -2.1) mm.
Scan location Stopping at pl 10
Ev179264151 Brick#20122
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Ev179264151 Brick#20122
X-projection
NetScan data analysis
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Ev179264151 Brick#20122
Y-projection
Z-projection
muon
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Manual scan results:• 5 tracks found @ 1ry vertex
0.2181 0.1099 54505.6 78946.6 0.65
0.0492 0.0018 54396.4 78878.7 6.96
-0.1088 0.1143 54285.8 78948.9 muon track
0.4429 -0.0049 54650.5 78870.3 0.19
0.1193 -0.0594 54445.5 78861.4 22.58 !!!!!!!
• Charm candidate!!! IP:22.58micron, • Electron pair found @ pl3• One interaction (6black+some showers) have been
seen near e-pair
Ev179264151 Brick#20122
Kinematical Analysis of the event going on..
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• 1ry vertex positions:– X: 54368.4 Y: 78875.3 depth: 672.1 in the lead plate.
• One track changing the slope at pl4– at pl5 slope--> 0.4197 0.0096 57580.1 79012.7
– at pl4 slope--> 0.4297 0.0621 58107.0 79044.1
– Kink angle: 0.0534439
• e-pair at pl 3– e-pair position: X: 55204.2 Y: 79577.4 depth: 77.5
– opening angle: 0.034141
– FL: 9686.3 micron
– 1) 0.0828 0.0635 55227.2 79595.0 found at CSD
– 2) 0.0947 0.0955 55229.9 79604.1 • --> scatter at pl2
• 0.1152 0.0967 55336.6 79686.2
• --> not found at pl1
Ev179264151 Brick#20122
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• All tracks followed down and search them at CSD, 5 out of 6 have been found.
Ev179264151 Brick#20122
e-pair at pl3
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Ev179264151 Brick#20122
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CC-eventBrick #: 4095329Event 18224511
37x-projection
Ev18224511 Brick#40953
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• Vertex manually confirmed (plate 46 in lead)
• 3 shower and 5 black tracks have been found.
Vertex positons:
X: 114205.2 Y: 94520.9 Z: 14086.8 (148micron)
-0.1269 -0.1899 -- SBtrack()
-0.4359 -0.0014 1.02
-0.0315 -0.0014 0.33
Ev18224511 Brick#40953
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CC-eventBrick #: 1429
Event 179351351
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X-projection
Ev17935151 Brick#1429
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Y-projection
Z-projection
Ev17935151 Brick#1429
• 1ry tracks:
-0.1242 -0.3170 6.66
0.2435 0.0116 0.79
-0.0637 -0.1381 -- muon
• 1ry vertex positions:
59665.5 21113.8 664.1
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NC-eventBrick #: 36564
Event 17868408
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X-projection
Ev17868408 Brick#36564
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Y-projection
Z-projection
Ev17868408 Brick#36564
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• Tracks at 1ry vertex: -0.0500 0.0512
0.2196 0.0386
-0.3484 0.0436
0.0854 0.1798
0.2832 -0.2448
0.5372 -0.1691
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CC-eventBrick #: 33540
Event 18027794
Kitagawa San will present that event..
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Event 180277945 CC
Mu+8.7 GeV/c
HPT SM1Not working
Ev18027794 Brick#33540
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Ev18027794 Brick#33540
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Tot P.E. 1199 Muon P.E. 582
1 brick proposed: (wall,cell,tray,iside) 9 13 29 1 prob= 0.98
Muon slopes Kalman 0.0282 0.215Muon slopes linear fit 0.0384 0.220
Extrap:
172.79364 -80.7020493 -669.255798 +- 0.482326657 0.472024381
Coordinates in emulsion frame: X 5.45781 Y 6.04764
Ev18027794 Brick#33540
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Ev18027794 Brick#33540
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CS scan an SB results Scanning Area (40mm x40mm) and (122mm x 95.5mm)
4 hold selection Prediction angle: 0.038, 0.220
Found Track angle and position
Difference from prediction angle: -0.025,0.011
Difference from prediction positions: (3.1, -1.4) mm.
Scan location Stopping at pl 56
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Track found on CSd (Blue thick line)
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Track found @vtx pl56(Blue thick line)
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Y-projection
Ev18027794 Brick#33540
NetScan data analysis
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X-projection
Z-projection
Ev18027794 Brick#33540
muon
