Difference between revisions of "Mattione Update 06252012"
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| [[Image:Mattione_Update_06252012_PIDFOM_PiMinus.png|left|500px|]] | | [[Image:Mattione_Update_06252012_PIDFOM_PiMinus.png|left|500px|]] | ||
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| + | <br style="clear:both;"/> | ||
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| + | == Initial Mass Peaks == | ||
| + | * φ Invariant Mass | ||
| + | [[Image:Mattione_Update_06252012_Mass_Phi.png|left|500px|]] | ||
| + | <br style="clear:both;"/> | ||
| + | |||
| + | * Proton Missing Mass | ||
| + | [[Image:Mattione_Update_06252012_Mass_Proton.png|left|500px|]] | ||
| + | <br style="clear:both;"/> | ||
| + | |||
| + | * Y(2175) Invariant Mass | ||
| + | [[Image:Mattione_Update_06252012_Mass_Y2175.png|left|500px|]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
Revision as of 10:40, 25 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
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PID
- PID FOM
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Initial Mass Peaks
- φ Invariant Mass
- Proton Missing Mass
- Y(2175) Invariant Mass
