Shower cut investigation Gen3 run1

after all single lepton cuts

• comparison momentum*charge gen2 and gen3:
  

• comparison momentum*charge gen2 and gen3 log scale:
  

• ratio gen2 and gen3 for negative particles:
  

• ratio gen2 and gen3 for positive particles:
  

• comparison momentum*charge gen2 and gen3 conversion electrons inside plot:
  

• comparison momentum*charge gen2 and gen3 conversion electrons not inside plot:
  

• comparison momentum*charge gen2 and gen3 only conversion electrons inside plot:
  

• ratio of comparison momentum*charge gen2 and gen3 only conversion electrons inside plot:
  

Further variables

• isshower vs momentum gen3:
  

• isshower vs momentum for gen3 after rich and beta cut:
  

• shower_sum0 vs momentum:
  

• shower_sum0 vs momentum after rich and beta cut:
  

Purity and Efficiency

invesitgation using pluto, no delta electrons included.

• purity and efficiency after rich cut:
  

• purity and efficiency after rich cut (zoom):
  

• purity and efficiency after rich and beta cut:
  

• purity and efficiency after rich and beta cut cut (zoom):
  

• purity and efficiency after all single lepton cuts:
  

• purity and efficiency after all single lepton cuts (zoom):
  

Purity and efficiency in numbers

invesitgation using pluto, no delta electrons included.

Gen2

cut number	purity	efficiency
only rich-mdc-crellation	90.2079	100
rich minimum bias	90.12	95.7663
beta cut	90.5484	92.2178
shower cut	91.121	87.7951

only momentum region -300 up to 300

cut number	purity	efficiency
only rich-mdc-crellation	90.2705	100
rich minimum bias	90.1905	95.9317
beta cut	90.6883	92.6716
shower cut	91.05	89.6329

Gen3

If one looks to the purity and efficiency cutwise one sees that by apllying a shower cut the increase in purity is by 1% while the efficiency drops to 81%. So one looses a lot of tracks, but gains little in purity. Further one sees that the other cuts after the rich-mdc correlation have little influence to the purity.

cut number	purity	efficiency
only rich-mdc-crellation	91.1489	100
rich minimum bias	91.0798	95.8249
beta cut	91.5565	91.7498
shower cut	92.4797	81.26

only momentum region -300 up to 300

cut number	purity	efficiency
only rich-mdc-crellation	91.3538	100
rich minimum bias	91.291	95.9574
beta cut	91.8274	92.0325
shower cut	92.6487	82.3237

-- YvonnePachmayer - 12 Mar 2007