Difference between revisions of "Mattione Update 06252012"
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* Final State: p, π<sup>+</sup>, π<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup> | * Final State: p, π<sup>+</sup>, π<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup> | ||
* Events Generated using genr8 with: 9 GeV Photons, Γ<sub>Y(2175)</sub> = 61 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0 | * Events Generated using genr8 with: 9 GeV Photons, Γ<sub>Y(2175)</sub> = 61 MeV/c<sup>2</sup>, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0 | ||
| + | |||
| + | == Analysis Overview == | ||
| + | * Require the combined FOM for PID (π<sup>+</sup>, π<sup>-</sup>, K<sup>+</sup>, K<sup>-</sup>) be > 1% | ||
| + | * Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms | ||
| + | * Kinematic Fit: 4-momentum conservation: p missing mass, φ invariant mass | ||
| + | * Require that the confidence level from the kinematic fit be > 1% | ||
== Thrown Track Parameters == | == Thrown Track Parameters == | ||
Revision as of 15:11, 24 June 2012
Reaction
- γ p → Y(2175), p
- Y(2175) → π+, π-, φ
- φ → K+, K-
- Y(2175) → π+, π-, φ
- Final State: p, π+, π-, K+, K-
- Events Generated using genr8 with: 9 GeV Photons, ΓY(2175) = 61 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Analysis Overview
- Require the combined FOM for PID (π+, π-, K+, K-) be > 1%
- Place very loose cuts on the φ invariant mass (0.8 - 1.3) and p missing mass (0.5 - 1.4): reduces # of bogus track combinations to save time / cleanup histograms
- Kinematic Fit: 4-momentum conservation: p missing mass, φ invariant mass
- Require that the confidence level from the kinematic fit be > 1%
Thrown Track Parameters
- p vs θ
