Difference between revisions of "Mattione Update 09212011"
From GlueXWiki
(→π<sup>-</sup> hit only in the vertical plane) |
(→TOF X Uncertainty) |
||
| (13 intermediate revisions by the same user not shown) | |||
| Line 4: | Line 4: | ||
* PLAN: I'm comparing the generated and reconstructed track parameters in the TOF, BCAL, and FCAL systems to determine the uncertainties. | * PLAN: I'm comparing the generated and reconstructed track parameters in the TOF, BCAL, and FCAL systems to determine the uncertainties. | ||
| − | * STATUS: TOF Uncertainties are below. | + | * STATUS: TOF Uncertainties are below. |
| − | + | ||
== TOF Time Uncertainty == | == TOF Time Uncertainty == | ||
| Line 23: | Line 22: | ||
=== π<sup>-</sup> hit only in the horizontal plane === | === π<sup>-</sup> hit only in the horizontal plane === | ||
| − | * Δt vs. x, y, | + | * Δt vs. x, y, dE |
[[Image:Mattione_Update_09212011_TOF_DeltaTVsX_Horizontal.gif|thumb|left|300px|Δt vs. x]] | [[Image:Mattione_Update_09212011_TOF_DeltaTVsX_Horizontal.gif|thumb|left|300px|Δt vs. x]] | ||
| − | [[Image:Mattione_Update_09212011_TOF_DeltaTVsdE_Horizontal.gif|thumb|left|300px|Δt vs | + | [[Image:Mattione_Update_09212011_TOF_DeltaTVsdE_Horizontal.gif|thumb|left|300px|Δt vs. dE]] |
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
* Fit the Δt distributions to Gaussian functions, σ<sub>t</sub>'s are fit below. | * Fit the Δt distributions to Gaussian functions, σ<sub>t</sub>'s are fit below. | ||
[[Image:Mattione_Update_09212011_TOF_SigmaTVsX_Horizontal.gif|thumb|left|300px|σ<sub>t</sub> vs. x]] | [[Image:Mattione_Update_09212011_TOF_SigmaTVsX_Horizontal.gif|thumb|left|300px|σ<sub>t</sub> vs. x]] | ||
| − | [[Image:Mattione_Update_09212011_TOF_SigmaTVsdE_Horizontal.gif|thumb|left|300px|σ<sub>t</sub> vs | + | [[Image:Mattione_Update_09212011_TOF_SigmaTVsdE_Horizontal.gif|thumb|left|300px|σ<sub>t</sub> vs. dE]] |
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
=== π<sup>-</sup> hit only in the vertical plane === | === π<sup>-</sup> hit only in the vertical plane === | ||
| − | * Δt vs. x, y, | + | * Δt vs. x, y, dE |
[[Image:Mattione_Update_09212011_TOF_DeltaTVsY_Vertical.gif|thumb|left|300px|Δt vs. y]] | [[Image:Mattione_Update_09212011_TOF_DeltaTVsY_Vertical.gif|thumb|left|300px|Δt vs. y]] | ||
| − | [[Image:Mattione_Update_09212011_TOF_DeltaTVsdE_Vertical.gif|thumb|left|300px|Δt vs | + | [[Image:Mattione_Update_09212011_TOF_DeltaTVsdE_Vertical.gif|thumb|left|300px|Δt vs. dE]] |
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
* Fit the Δt distributions to Gaussian functions, σ<sub>t</sub>'s are fit below. | * Fit the Δt distributions to Gaussian functions, σ<sub>t</sub>'s are fit below. | ||
[[Image:Mattione_Update_09212011_TOF_SigmaTVsY_Vertical.gif|thumb|left|300px|σ<sub>t</sub> vs. y]] | [[Image:Mattione_Update_09212011_TOF_SigmaTVsY_Vertical.gif|thumb|left|300px|σ<sub>t</sub> vs. y]] | ||
| − | [[Image:Mattione_Update_09212011_TOF_SigmaTVsdE_Vertical.gif|thumb|left|300px|σ<sub>t</sub> vs | + | [[Image:Mattione_Update_09212011_TOF_SigmaTVsdE_Vertical.gif|thumb|left|300px|σ<sub>t</sub> vs. dE]] |
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
| + | |||
| + | == TOF Deposited Energy Uncertainty == | ||
| + | |||
| + | === π<sup>-</sup> hits in both TOF planes === | ||
| + | * ΔdE (Measured Average - Most Probable) vs. Most Probable (NOT True) dE | ||
| + | [[Image:Mattione_Update_09212011_TOF_DeltadEVsProbabledE.gif|thumb|left|500px|ΔdE vs. Most Probable dE]] | ||
| + | * ΔdE (Measured Average - Most Probable) vs. Measured Average dE | ||
| + | [[Image:Mattione_Update_09212011_TOF_DeltadEVsAvgdE.gif|thumb|left|500px|ΔdE vs. Measured Avg. dE]] | ||
| + | <br style="clear:both;"/> | ||
| + | |||
| + | * Most probable deposited energy calculated via Equation 27.10 in Section 27.2.7 of the [http://pdg.lbl.gov/2011/reviews/rpp2011-rev-passage-particles-matter.pdf RPP]. | ||
| + | |||
| + | * Perhaps the best way to do it is to look at the dE distribution as a function of track βγ, and get the uncertainty from the width of that distribution. How would the energy uncertainty be calibrated using real data? | ||
| + | |||
| + | == TOF X Uncertainty == | ||
| + | |||
| + | === π<sup>-</sup> hits in both TOF planes === | ||
| + | * Δx vs. x | ||
| + | [[Image:Mattione_Update_09212011_TOF_DeltaXVsX.gif|thumb|left|500px|Δx vs. x]] | ||
| + | <br style="clear:both;"/> | ||
| + | |||
| + | * Fit the Δx distributions to Gaussian functions, means are shown below. | ||
| + | [[Image:Mattione_Update_09212011_TOF_MeanXVsX.gif|thumb|left|500px|μ<sub>x</sub> vs. x]] | ||
| + | <br style="clear:both;"/> | ||
| + | |||
| + | * I'm not sure, but I think the skews may be due to the cut used to identify when the hits matched between planes. | ||
Latest revision as of 13:31, 21 September 2011
Contents
Summary
- OBJECTIVE: I'm updating the reconstruction uncertainties to improve the particle-ID algorithms and support the kinematic fitting analyses.
- PLAN: I'm comparing the generated and reconstructed track parameters in the TOF, BCAL, and FCAL systems to determine the uncertainties.
- STATUS: TOF Uncertainties are below.
TOF Time Uncertainty
π- hits in both TOF planes
- Δt vs. x, y, average dE
- Fit the Δt distributions to Gaussian functions, σt's are fit below.
π- hit only in the horizontal plane
- Δt vs. x, y, dE
- Fit the Δt distributions to Gaussian functions, σt's are fit below.
π- hit only in the vertical plane
- Δt vs. x, y, dE
- Fit the Δt distributions to Gaussian functions, σt's are fit below.
TOF Deposited Energy Uncertainty
π- hits in both TOF planes
- ΔdE (Measured Average - Most Probable) vs. Most Probable (NOT True) dE
- ΔdE (Measured Average - Most Probable) vs. Measured Average dE
- Most probable deposited energy calculated via Equation 27.10 in Section 27.2.7 of the RPP.
- Perhaps the best way to do it is to look at the dE distribution as a function of track βγ, and get the uncertainty from the width of that distribution. How would the energy uncertainty be calibrated using real data?
TOF X Uncertainty
π- hits in both TOF planes
- Δx vs. x
- Fit the Δx distributions to Gaussian functions, means are shown below.
- I'm not sure, but I think the skews may be due to the cut used to identify when the hits matched between planes.
