Concerning stripping/HLT1correlations
9
Jacopo Nardulli, CERN 2/4/2009 B DX Stripping 1 / 9 CP WG Concerning stripping/HLT1correlations The issue: How much does the HLT1 cut ? Defined as events passing the stripping and L0 events passing stripping+L0+HLT1 This is an update of this previous talk CP measurements WG: gamma with trees (05 March 2009 Jacopo Nardulli, Vladimir Gligorov RAL, Glasgow
description
Concerning stripping/HLT1correlations. Jacopo Nardulli, Vladimir Gligorov RAL, Glasgow. This is an update of this previous talk CP measurements WG: gamma with trees (05 March 2009). The issue: How much does the HLT1 cut ? Defined as events passing the stripping and L0 - PowerPoint PPT Presentation
Transcript of Concerning stripping/HLT1correlations
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 1 / 9 CP WG
Concerning stripping/HLT1correlations
The issue: How much does the HLT1 cut ?Defined as events passing the stripping and L0 events passing stripping+L0+HLT1
This is an update of this previous talkCP measurements WG: gamma with trees (05 March 2009)
Jacopo Nardulli, Vladimir Gligorov RAL, Glasgow
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 2 / 9 CP WG
Previous resultsHere all alleys. Both TIS and TOS
Removing almost all the cuts 19.1(Bigger cause I removed all the cuts )
+ 2.5 Gev Pt cut on one of daughters 8.8
+ 5.0 Gev Pt cut on one of daughters 5.4
No Pt cuts + pointing cut @ < 0.4 17.4
Pt on one daughter > 2.5GeV + pointing cut @ < 0.4
8.7
No Pt cuts + No pointing cut + track χ2 cut at < 10
18.1
Previous results can be found here:CP measurements WG: gamma with trees (05 March 2009)
Now will look into more detail at various lines and at TIS/TOS
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 3 / 9 CP WG
Removing almost all the cutsfor mbias L0-yes events I get
1260 pass
73 pass HLT1
~factor 17 as seen before !
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 4 / 9 CP WG
19 HLT1 DiHad
Let’s now take only the L0-hadron
1260 pass
765Pass
L0-had
16 HLT1 SingleHad
7~28 factor bigger than what seen before
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 5 / 9 CP WG
19 HLT1 DiHad
Splitting in TIS/TOS/TOB
1260 pass
765Pass
L0-had
362TIS
303 TOS
16 HLT1 SingleHad
7
100TOB
3
7
518
7
3
4
4
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 6 / 9 CP WG
So for TOS events I have
1260 pass
765Pass
L0-had
303 TOS
18
7
~factor 22
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 7 / 9 CP WG
What did we learn so far ?
•Removing almost all the stripping cuts we still have this factor of events cut by the HLT1 (which obviously gets bigger) We can re-produce it for TOS events which pass the L0-hadron and then look separately at the Single and di-Hadron linesWhat’s next ?• Adding HLT1 like cuts one by one in the stripping and see what changes.
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 8 / 9 CP WG
Adding the cuts(now looking only at L0-had-TOS events & HLT1 Single&Di Hadron)
Previous configuration (PC) 22
PC + pointing cut @ < 0.4 Unchanged
PC + IP > 0.1mm cut on one of the daughters 17
PC + track χ2 at < 10 on one of the daughters Unchanged
PC + 2.5 Gev Pt cut on one of the daughters 11
PC + 5.0 Gev Pt cut on one of the daughters 7
Previous configuration 22
PC + IP > 0.1mm + 5.0 Gev Pt on one of the daughters
5.1
Jacopo Nardulli, CERN 2/4/2009B DX Stripping 9 / 9 CP WG
Adding the cuts(now looking only at L0-had-TOS events & HLT1 Single&Di Hadron)
Previous configuration 22
PC + IP > 0.1mm + 5.0 Gev Pt on one of the daughters
5.1
PC + IP > 0.1mm + 5.0 Gev Pt
+ old stripping selection, not the one just showed by Vava
3.3
