Difference between revisions of "Mattione Update 11162011"
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| − | == Introduction == | + | == DC dE/dx Study Overview == |
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| + | === Introduction === | ||
* 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, π<sup>+</sup>'s, and π<sup>-</sup>). | * DC dE/dx Confidence Level (for protons, similar for K+'s, π<sup>+</sup>'s, and π<sup>-</sup>). | ||
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<br style="clear:both;"/> | <br style="clear:both;"/> | ||
| − | === | + | === Procedure === |
| − | * CDC & FDC treated separately | + | * 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 | + | ** 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. |
| − | + | * Will fit mean and σ of these distributions and use them in calculation of χ<sup>2</sup> | |
== CDC π<sup>+</sup>== | == CDC π<sup>+</sup>== | ||
Revision as of 13:05, 16 November 2011
Contents
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-).
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.
- Will fit mean and σ of these distributions and use them in calculation of χ2
CDC π+
- Generated up to p = 9.0 GeV/c
- CDC π+ dE/dx vs. βγ
- CDC π+ dE/dx Mean, Resolution vs. βγ
- CDC π+ dE/dx Mean, Resolution in different dx Bins vs. βγ
FDC π+
- Generated up to p = 9.0 GeV/c
- FDC π+ dE/dx vs. βγ
- FDC π+ dE/dx Mean, Resolution vs. βγ
- FDC π+ dE/dx Mean, Resolution in different dx Bins vs. βγ
CDC vs. FDC π+
- CDC vs. FDC π+ dE/dx Mean, Resolution vs. βγ
