regina rescigno, giustino damato, cristiano bozza – salerno emulsion group – jan 2009 scanning...
TRANSCRIPT
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Scanning Report from Salerno
• Brick scanning overview
• Event gallery
• General statistics
• Conclusions
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Brick scanning summary
NC CC
Bricks delivered 12 62
Scanning started 12 61
CS-brick connected 11* 60
Vertex found + SF + Feedback 7 45
Passing-through 1** 2
Side edge-out 1 1
Vertex in dead material 0 2
Under study 2 4
Pending (waiting for 3/4 or TT connection) 1 7
Not started yet 0 1
* Brick 5969 is a NC with black CS. 1 track found, but passes through the brick.** Brick 134936 has a secondary interaction of a NC event; parent track followed to plate 1
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event gallery
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 224778801 Brick 150194 (fog ≃14grs/1000m3)
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 224778801 Brick 150194 (fog ≃14grs/1000m3)
Hint for shower in the CS candidates
Human-assisted TotalScan, plates 5722: 1 cm2 around shower axis,reconstruct every 10 plates, check for shower/vertex
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 224778801 Brick 150194 (fog ≃14grs/1000m3)
Vertex found between plates 35 and 36
XY XZ
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 224778801 Brick 150194 (fog ≃14grs/1000m3)
Vertex found between plates 35 and 36
Tilted XY
Two showers found ( is likely)
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 237882171 Brick 134936 – NC, passing through with secondary
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 237882171 Brick 134936 – NC, passing through with secondary
3-prong vertex with primary
Another passing-through
The twopassing-through tracks do not converge
(seen on XZ)
YZ
XZ
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 234925885 Brick 143527
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 234925885 Brick 143527
XY
YZ
Close-up
Track stoppingin the volumedownstreamof the vertex,not seen on CS
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Event gallery
Event 234925885 Brick 143527
Tilted view
Track stoppingin the volumedownstreamof the vertex,not seen on CSIP = 80.5 mZ = 1900 m
CS check needed
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
General Statistics
General Statistics
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
General Statistics: Vertex features
Charged multiplicity of CC primary vertices Charged multiplicity of NC primary vertices
Average multiplicity: 3.6QE-like: 9/44 = 20%
Average multiplicity: 3.6
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
General Statistics: Vertex features
Muon impact parameter Hadron impact parameter
Average IP: 2.8 m Average IP: 12.0 m
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
General Statistics: Vertex features
Azimuthal angle in frame between muon and hadrons
, degrees
h
Clear anti-correlation between muon and hadron directions
Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009
Conclusions
Scanning stopped for Christmas holidays, restarted smoothly
Event statistics increasing steadily
Running parameters stable since several months(No brick-by-brick tuning)