Difference between revisions of "Mattione Update 11302011"

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** σ is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
 
** σ is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
 
{| class="wikitable"
 
{| class="wikitable"
−
| [[Image:Mattione_Update_11302011_MeandEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|600px|CDC, &pi;<sup>+</sup>, &mu;]]
+
| [[Image:Mattione_Update_11302011_MeandEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|500px|CDC, &pi;<sup>+</sup>, &mu;]]
−
| [[Image:Mattione_Update_11302011_SigmadEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|600px|CDC, &pi;<sup>+</sup>, &sigma;]]
+
| [[Image:Mattione_Update_11302011_SigmadEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|500px|CDC, &pi;<sup>+</sup>, &sigma;]]
 
|}
 
|}
  
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** &sigma; is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
 
** &sigma; is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
 
{| class="wikitable"
 
{| class="wikitable"
−
| [[Image:Mattione_Update_11302011_MeandEdxVsBetaGamma_CDCProton.gif|thumb|left|600px|CDC, protons, &mu;]]
+
| [[Image:Mattione_Update_11302011_MeandEdxVsBetaGamma_CDCProton.gif|thumb|left|500px|CDC, protons, &mu;]]
−
| [[Image:Mattione_Update_11302011_SigmadEdxVsBetaGamma_CDCProton.gif|thumb|left|600px|CDC, protons, &sigma;]]
+
| [[Image:Mattione_Update_11302011_SigmadEdxVsBetaGamma_CDCProton.gif|thumb|left|500px|CDC, protons, &sigma;]]
 
|}
 
|}
  
 
== CDC Proton Confidence Levels ==
 
== CDC Proton Confidence Levels ==
 
* Confidence Level of all protons with # CDC hits >= 6 (# used hits > 3)
 
* Confidence Level of all protons with # CDC hits >= 6 (# used hits > 3)
−
[[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProton.gif|thumb|left|600px|CDC, protons, # CDC hits >= 6]]
+
[[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProton.gif|thumb|left|500px|CDC, protons, # CDC hits >= 6]]
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
 
* Confidence Level of protons with varying # of CDC hits used
 
* Confidence Level of protons with varying # of CDC hits used
 
{| class="wikitable"
 
{| class="wikitable"
−
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin1.gif|thumb|left|600px|CDC, protons, # Hits Used = 4]]
+
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin1.gif|thumb|left|500px|CDC, protons, # Hits Used = 4]]
−
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin2.gif|thumb|left|600px|CDC, protons, # Hits Used = 6]]
+
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin2.gif|thumb|left|500px|CDC, protons, # Hits Used = 6]]
 
|-
 
|-
−
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin3.gif|thumb|left|600px|CDC, protons, # Hits Used = 8]]
+
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin3.gif|thumb|left|500px|CDC, protons, # Hits Used = 8]]
−
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin4.gif|thumb|left|600px|CDC, protons, # Hits Used = 10]]
+
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin4.gif|thumb|left|500px|CDC, protons, # Hits Used = 10]]
 
|-
 
|-
−
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin5.gif|thumb|left|600px|CDC, protons, # Hits Used = 12]]
+
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin5.gif|thumb|left|500px|CDC, protons, # Hits Used = 12]]
−
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin6.gif|thumb|left|600px|CDC, protons, # Hits Used = 14]]
+
| [[Image:Mattione_Update_11302011_ConfidenceLevel_CDCProtonBin6.gif|thumb|left|500px|CDC, protons, # Hits Used = 14]]
 
|}
 
|}

Revision as of 14:08, 30 November 2011

DC dE/dx Study Overview

Introduction

  • DC dE/dx information used for PID is bad, is disabled until fixed.
    • DC dE/dx Confidence Level (for protons, similar for K+'s, π+'s, and π-).
protons


Procedure

  • Look at reconstructed dE/dx in CDC & FDC (treated separately: different gas mixtures).
    • Half of the track hits in each of the FDC/CDC (those with the largest dE/dx) are ignored: truncates Landau distribution to resemble Gaussian distribution.
  • Fit mean and σ of these distributions and use them in calculation of χ2

FDC

  • FDC π+ dE/dx μ & σ
    • σ is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
FDC, π+, μ
FDC, π+, σ
  • FDC protons dE/dx μ & σ
    • σ is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
FDC, protons, μ
FDC, protons, σ

CDC

  • CDC π+ dE/dx μ & σ
    • σ is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
CDC, π+, μ
CDC, π+, σ
  • CDC protons dE/dx μ & σ
    • σ is dependent on amount of information: # hits USED (= 1/2 of total # hits: reject largest dE/dx hits to remove Landau tail)
CDC, protons, μ
CDC, protons, σ

CDC Proton Confidence Levels

  • Confidence Level of all protons with # CDC hits >= 6 (# used hits > 3)
CDC, protons, # CDC hits >= 6


  • Confidence Level of protons with varying # of CDC hits used
CDC, protons, # Hits Used = 4
CDC, protons, # Hits Used = 6
CDC, protons, # Hits Used = 8
CDC, protons, # Hits Used = 10
CDC, protons, # Hits Used = 12
CDC, protons, # Hits Used = 14
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