Difference between revisions of "Mattione Update 11072011"
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=== Reference === | === Reference === | ||
| − | * Fit the results of David's study: Fit γ BCAL σ<sub>t_1234</sub> / σ<sub>t_334</sub> vs. θ in dE bins: | + | * Fit the results of David's study: Fit γ BCAL σ<sub>t_1234</sub> / σ<sub>t_334</sub> vs. θ in dE bins: show significant (> 10%) timing improvement is between 15 < θ < 35. |
** Don't trust fits at low-θ, so linearly-interpolate between 12 and 16 degrees. | ** Don't trust fits at low-θ, so linearly-interpolate between 12 and 16 degrees. | ||
[[Image:Mattione_Update_10312011_BCALPhotonTimeResolutionRatio_Fits1.gif|thumb|left|300px]] | [[Image:Mattione_Update_10312011_BCALPhotonTimeResolutionRatio_Fits1.gif|thumb|left|300px]] | ||
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Revision as of 13:30, 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: show significant (> 10%) timing improvement is between 15 < θ < 35.
- Don't trust fits at low-θ, so linearly-interpolate between 12 and 16 degrees.
