Difference between revisions of "Mattione Update 11162011"

From GlueXWiki
Jump to: navigation, search
(Introduction)
Line 2: Line 2:
 
* DC dE/dx information used for PID is bad, is disabled until fixed.  
 
* DC dE/dx information used for PID is bad, is disabled until fixed.  
 
* DC dE/dx Confidence Level (for protons, similar for K+'s, &pi;<sup>+</sup>'s, and &pi;<sup>-</sup>).  
 
* DC dE/dx Confidence Level (for protons, similar for K+'s, &pi;<sup>+</sup>'s, and &pi;<sup>-</sup>).  
[[Image:Mattione_Update_11162011_DCdEdxConfidenceLevel.gif|thumb|left|600px|CDC, &pi;<sup>+</sup>]]
+
[[Image:Mattione_Update_11162011_DCdEdxConfidenceLevel.gif|thumb|left|600px|protons]]
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
Line 8: Line 8:
 
* CDC & FDC treated separately since they have different gas mixtures.  
 
* CDC & FDC treated separately since they have different gas mixtures.  
 
* Half of the track hits in each of the FDC/CDC (those with the largest dE/dx) are ignored.  
 
* 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.
+
** Truncates Landau distribution to resemble Gaussian distribution.
  
 
== CDC &pi;<sup>+</sup>==
 
== CDC &pi;<sup>+</sup>==

Revision as of 11:36, 16 November 2011

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


Notes

  • CDC & FDC treated separately since they have 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.

CDC π+

  • Generated up to p = 2.0 GeV/c
  • CDC π+ dE/dx Mean, Resolution vs. βγ
CDC, π+
CDC, π+


  • CDC π+ dE/dx Mean, Resolution in different dx Bins vs. βγ


FDC π+

  • Generated up to p = 2.0 GeV/c
  • FDC π+ dE/dx vs. βγ
FDC, π+


  • FDC π+ dE/dx Mean, Resolution vs. βγ
FDC, π+
FDC, π+


  • FDC π+ dE/dx Mean, Resolution in different dx Bins vs. βγ
FDC, π+
FDC, π+


CDC vs. FDC π+

  • CDC vs. FDC π+ dE/dx Mean, Resolution vs. βγ
π+
π+