Mattione Update 11162011

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^-).

CDC, π⁺

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

File:Mattione Update 11162011 MeandEdxVsBetaGammadxBins CDCPiPlus.gif CDC, π+

File:Mattione Update 11162011 SigmadEdxVsBetaGammadxBins CDCPiPlus.gif CDC, π+

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+