1 Status of Located Event Analysis On behalf of Nagoya Scanning Group Umut KOSE OPERA Emulsion Workshop, January 2008, Nagoya, JAPAN

2 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 CC PL CC PL NC PL CC PL CC PL CC PL CC PL54

3 EventEvent type Stop Plate 1rycomment CC PL105 e-pair, charm!! CC PL563; 1 black 2 e-pairs NC PL CC PL CC PL257 e-pair, Neutral 2ndry? CC PL463; 5 black CC PL54Single stop QE-like!!

4 CC-event Brick #: Event

5 Ev Brick#53486

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9 Event st brick 0.98 SM Wall, side, row, cell Brick N., status Kalman: slopes X,Y K: Extrapolation K: dist. from borders evt x,y mm class K: Coordinates in emu. frame x,y mm Linear slopes X,Y Linear extrap X,Y,Z Linear coordinates in emu. frame x,y mm Ev Brick#53486

10 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, ) (33.0, 74.0) 2) (-0.171, ) (31.3, 84.6 ) 3) ( 0.186, 0.057) (40.3, 94.2) 4) ( 0.608, ) (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? Ev Brick#53486

11 Ev Brick#53486

12 Ev Brick#53486 Ev Brick#53486

13 Ev Brick# emulsion films have been found

14 ScanBack location result Ev Brick#53486 SB location 2 times tried, in the first trial SB stopped at pl 25 in the second stopped at pl 51.

15 Z-projection Ev Brick#53486 X-projection Y-projection muon NetScan Data Analysis at stopping plate 25

16 8 tracks sent to manual scan (9 tracks found at 1ry) }-->epair * }-->epair * *found during manual scan.. Ev Brick#53486

17 8 tracks have been sent to manual scan (plate 25 in lead), 9 tracks have been found at 1ry vertex 1ry vertex positons: e-pair FL = micron, Opening angle: 0.044rad. One more neutral 2ndry at plate 23 ??? FL ~ 3100micron, parent slope: (0.430;-0.120) Ev Brick#53486

18 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 Ev Brick#53486

19 Ev Brick#53486

20 Ev Brick#53486 SB first trial

21 Ev Brick#53486 SB second trial

22 Checking SB track and follow down track at pl2 and 1. pl B M M pl M M Base --> dx: ; dy: Up --> dx: ; dy: Down --> dx: ; dy: SB > Follow > SB > Ev Brick#53486

23 Checking plate 51 again The Scanback Track penetrating Ev Brick#53486 Cosmic !!!

24 CC-event Brick #: Event

GeV/c 2470 tot pe mu pe Ev Brick#20122

26 Ev Brick#20122

27 PWall4>83% Ev Brick#20122

28 RS, Wall 4, Tray 17 Cell 25 prob= 0.83 RS, Wall 5 Tray 17 Cell25 prob= 0.17 Kalman slopes: Linearfit slopes: Emu coordinates: X Y Ev Brick#20122

29 CS scan and SB Scanning Area (40mm x32mm) and (122mm x 95.5mm) CS fog density: (ESS measurement) 4 hold selection Prediction angle: (-0.109, ) Predicted film position: (36.3, 83.0) mm Found Track angle and position Difference from prediction angle: , Difference from prediction positions: (17.3, -2.1) mm. Scan location  Stopping at pl 10 Ev Brick#20122

30 Ev Brick#20122 X-projection NetScan data analysis

31 Ev Brick#20122 Y-projection Z-projection muon

32 Manual scan results: 5 tracks 1ry vertex muon track !!!!!!! Charm candidate!!! IP:22.58micron, Electron pair pl3 One interaction (6black+some showers) have been seen near e-pair Ev Brick#20122 Kinematical Analysis of the event going on..

33 1ry vertex positions: –X: Y: depth: in the lead plate. One track changing the slope at pl4 –at pl5 slope--> –at pl4 slope--> –Kink angle: e-pair at pl 3 –e-pair position: X: Y: depth: 77.5 –opening angle: –FL: micron –1) found at CSD –2) > scatter at pl > not found at pl1 Ev Brick#20122

34 All tracks followed down and search them at CSD, 5 out of 6 have been found. Ev Brick#20122 e-pair at pl3

35 Ev Brick#20122

36 CC-event Brick #: Event

37 x-projection Ev Brick#40953

38 Vertex manually confirmed (plate 46 in lead) 3 shower and 5 black tracks have been found. Vertex positons: X: Y: Z: (148micron) SBtrack(  ) Ev Brick#40953

39 CC-event Brick #: 1429 Event

40 X-projection Ev Brick#1429

41 Y-projection Z-projection Ev Brick#1429 1ry tracks: muon 1ry vertex positions:

42 NC-event Brick #: Event

43 X-projection Ev Brick#36564

44 Y-projection Z-projection Ev Brick#36564

45 Tracks at 1ry vertex:

46 CC-event Brick #: Event Kitagawa San will present that event..

47 Event CC Mu+ 8.7 GeV/c HPT SM1 Not workin g Ev Brick#33540

48 Ev Brick#33540

49 Tot P.E Muon P.E brick proposed: (wall,cell,tray,iside) prob= 0.98 Muon slopes Kalman Muon slopes linear fit Extrap: Coordinates in emulsion frame: X Y Ev Brick#33540

50 Ev Brick#33540

51 CS scan an SB results Scanning Area (40mm x40mm) and (122mm x 95.5mm) 4 hold selection Prediction angle: 0.038, Found Track angle and position Difference from prediction angle: ,0.011 Difference from prediction positions: (3.1, -1.4) mm. Scan location  Stopping at pl 56 Ev Brick#33540

52 Track found on CSd (Blue thick line) Ev Brick#33540

53 Track pl56(Blue thick line) Ev Brick#33540

54 Y-projection Ev Brick#33540 NetScan data analysis

55 X-projection Z-projection Ev Brick#33540 muon