Difference between revisions of "Mattione Update 11072011"
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* π<sup>+</sup> Reconstructed BCAL Time Resolution | * π<sup>+</sup> Reconstructed BCAL Time Resolution | ||
− | ** NOTE: | + | ** NOTE: For 1234 Scheme: the shower time was smeared by: σ<sub>smear</sub> = sqrt(σ<sup>2</sup><sub>t_1234_Target</sub> - σ<sup>2</sup><sub>t_334_NoSmear</sub>), where σ<sub>t_1234_Target</sub> = σ<sub>t_334</sub>*Improvement_Ratio, Improvement_Ratio = σ<sub>t_1234</sub> / σ<sub>t_334</sub> |
[[Image:Mattione_Update_11072011_BCALPiPlusSigmaTCompare_Bin1.gif|thumb|left|600px]] | [[Image:Mattione_Update_11072011_BCALPiPlusSigmaTCompare_Bin1.gif|thumb|left|600px]] |
Revision as of 12:57, 7 November 2011
Contents
Procedure
- Reconstruct π(1600) -> b1π events with t-slope = 2.0 using both the 334 and 1234 segmentations
- Plot Δβ vs p for π+ candidates to see proton, π+ separation.
π(1600) -> b1pi Events
p vs. θ
- p vs. θ
- NOTE: time improvement only at forward angles, so will be negligible for protons in this reaction.
π+ BCAL Δβ vs p
Δβ = βp - βt = p/sqrt(p*p + m*m) - path/(c*TOF)
- π(1600) -> b1pi Events, π+ Candidates, BCAL Δβ vs p, 334 Segmentation
Problems
- π+ Reconstructed BCAL Time Resolution
- NOTE: For 1234 Scheme: the shower time was smeared by: σsmear = sqrt(σ2t_1234_Target - σ2t_334_NoSmear), where σt_1234_Target = σt_334*Improvement_Ratio, Improvement_Ratio = σt_1234 / σt_334
Reference
- Fit the results of David's study: Fit γ BCAL σt_1234 / σt_334 vs. θ in dE bins:
- Don't trust fits at low-θ, so linearly-interpolate between 12 and 16 degrees.