Update : cuts for clusterMaker

1
Update cuts for clusterMaker

• No cut on the neighbouring strips to the central
  strip in a cluster in the actual soft
• Cut on the strips
• From 1
• (s/n)seed 10
• (s/n)neighbouring 2
• Comparison of the current version of the soft and
  this modification

1 Alice internal note99-22 Off and in-beam
tests of Silicon-strip Detectors for the Alice
experiment at LHC
2
Clusters size
Current version
Number of strips

• For the 20 ladders (blue side P, red side N)
• Max of histos (X axis) 768 strips

3
Modified

• As seen with the previous cut on the
  neighbouring strips I did (s/n 1,2,3)
• , the size of the clusters is decreasing with
  this one.

4
SN ratio from the clusters
Current version

• S/N defined
• S ?si
• N ?(ni/size)
• Looks like a landau distribution for more or less
  all the ladders

5
Modified

• Some ladders dont have anymore this landau
  shape

6
SNratio wrt cut on neighboring strip
N side
P side

• SN cut for the seed (s/n)seed 5
• SN cut varies from no cut,1,2,3 for the
  neighboring strips
• Always a landau shape

7
Charge Matching N/P(current)
pulseHeight N
pulseHeight P
8
Charge Matching N/P(modified)
pulseHeight N
pulseHeight P
Less hits far from the perfect charge Matching
9
Ssd hits vs globals tracks
Current version

• ? lt 1
• zvtx lt 5 cm
• nFittedTPC gt25

• ssd hits gt globals

Modified

• ssd hits globals