Difference between revisions of "Mattione Update 11162011"
From GlueXWiki
(9 intermediate revisions by the same user not shown) | |||
Line 1: | Line 1: | ||
− | == | + | == 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;"/> | <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 | ||
Line 42: | Line 33: | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
− | == CDC | + | == CDC π<sup>+</sup>== |
+ | * Generated up to p = 9.0 GeV/c | ||
− | * CDC vs. | + | * 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 | ||
{| class="wikitable" | {| class="wikitable" | ||
− | | [[Image: | + | | [[Image:Mattione_Update_11162011_MeandEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|600px|CDC, π<sup>+</sup>]] |
− | | [[Image: | + | | [[Image:Mattione_Update_11162011_SigmadEdxVsBetaGamma_CDCPiPlus.gif|thumb|left|600px|CDC, π<sup>+</sup>]] |
|} | |} | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
− | * CDC | + | <!-- |
+ | * CDC π<sup>+</sup> dE/dx Mean, Resolution in different dx Bins vs. βγ | ||
{| class="wikitable" | {| class="wikitable" | ||
− | | [[Image: | + | | [[Image:Mattione_Update_11162011_MeandEdxVsBetaGammadxBins_CDCPiPlus.gif|thumb|left|600px|CDC, π<sup>+</sup>]] |
− | | [[Image: | + | | [[Image:Mattione_Update_11162011_SigmadEdxVsBetaGammadxBins_CDCPiPlus.gif|thumb|left|600px|CDC, π<sup>+</sup>]] |
+ | |} | ||
+ | <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;"/> | <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