Difference between revisions of "Mattione Update 11162011"
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+ | == 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<sup>+</sup>'s, and π<sup>-</sup>). | ||
+ | [[Image:Mattione_Update_11162011_DCdEdxConfidenceLevel.gif|thumb|left|600px|protons]] | ||
+ | <br style="clear:both;"/> | ||
+ | |||
+ | === 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 χ<sup>2</sup> | ||
+ | |||
== FDC π<sup>+</sup> == | == FDC π<sup>+</sup> == | ||
− | * Generated up to p = | + | * Generated up to p = 9.0 GeV/c |
* FDC π<sup>+</sup> dE/dx vs. βγ | * FDC π<sup>+</sup> dE/dx vs. βγ | ||
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== CDC π<sup>+</sup>== | == CDC π<sup>+</sup>== | ||
− | * Generated up to p = | + | * Generated up to p = 9.0 GeV/c |
+ | |||
+ | * CDC π<sup>+</sup> dE/dx vs. βγ | ||
+ | [[Image:Mattione_Update_11162011_dEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|600px|CDC, π<sup>+</sup>]] | ||
+ | <br style="clear:both;"/> | ||
* CDC π<sup>+</sup> dE/dx Mean, Resolution vs. βγ | * CDC π<sup>+</sup> dE/dx Mean, Resolution vs. βγ | ||
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<br style="clear:both;"/> | <br style="clear:both;"/> | ||
+ | <!-- | ||
* CDC π<sup>+</sup> dE/dx Mean, Resolution in different dx Bins vs. βγ | * CDC π<sup>+</sup> dE/dx Mean, Resolution in different dx Bins vs. βγ | ||
{| class="wikitable" | {| class="wikitable" | ||
Line 36: | Line 54: | ||
|} | |} | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
+ | --> | ||
− | == | + | == CDC vs. FDC π<sup>+</sup> == |
+ | |||
+ | * CDC vs. FDC π<sup>+</sup> dE/dx Mean, Resolution vs. βγ | ||
+ | {| class="wikitable" | ||
+ | | [[Image:Mattione_Update_11162011_MeandEdxVsBetaGamma_CDCvsFDCPiPlus.gif|thumb|left|600px|π<sup>+</sup>]] | ||
+ | | [[Image:Mattione_Update_11162011_SigmadEdxVsBetaGamma_CDCvsFDCPiPlus.gif|thumb|left|600px|π<sup>+</sup>]] | ||
+ | |} | ||
+ | <br style="clear:both;"/> |
Latest revision as of 14:22, 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
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 π+
- Generated up to p = 9.0 GeV/c
- CDC π+ dE/dx vs. βγ
- CDC π+ dE/dx Mean, Resolution vs. βγ
CDC vs. FDC π+
- CDC vs. FDC π+ dE/dx Mean, Resolution vs. βγ