Difference between revisions of "Mattione Kaon PID Studies phi3(1850)"
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* Kinematic Fit Confidence Level (Zoomed in; spike at 0 confidence is well off the top of the plot) | * Kinematic Fit Confidence Level (Zoomed in; spike at 0 confidence is well off the top of the plot) | ||
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
| − | !width=" | + | !width="75"| Recoil p |
!width="350"| P4 KinFit | !width="350"| P4 KinFit | ||
!width="350"| VertexP4 KinFit | !width="350"| VertexP4 KinFit | ||
|- | |- | ||
| − | ! Missing | + | ! Missing |
| [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] | | [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] | ||
|- | |- | ||
| − | ! | + | ! Not Missing |
| [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] | | [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_KinFitConLev_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] | ||
|} | |} | ||
| Line 35: | Line 35: | ||
* Missing Mass & Missing Mass Squared (Before/After KinFit) | * Missing Mass & Missing Mass Squared (Before/After KinFit) | ||
{| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | {| border="1" cellpadding="2" align="left" valign="top" style="text-align:center;" | ||
| − | !width=" | + | !width="75"| Recoil p |
!width="350"| No KinFit | !width="350"| No KinFit | ||
!width="350"| P4 KinFit | !width="350"| P4 KinFit | ||
!width="350"| VertexP4 KinFit | !width="350"| VertexP4 KinFit | ||
|- | |- | ||
| − | ! Missing | + | ! Missing |
| [[Image:Mattione_Update_09132012_MissingMass_MissingP_NoKinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] | | [[Image:Mattione_Update_09132012_MissingMass_MissingP_NoKinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMass_MissingP_VertexP4KinFit_Phi1850.png|left|350px]] | ||
|- | |- | ||
| − | ! | + | ! Not Missing |
| [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_NoKinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] | | [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_NoKinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_P4KinFit_Phi1850.png|left|350px]] || [[Image:Mattione_Update_09132012_MissingMassSq_NoMissing_VertexP4KinFit_Phi1850.png|left|350px]] | ||
|} | |} | ||
Revision as of 17:44, 13 September 2012
Contents
Reaction
- γ p → φ3(1850), p
- φ3(1850) → K+, K-
- Final State: p, K+, K-
- Events generated with: Γφ3(1850) = 87 MeV/c2, t-slope = 5.0, 50.0 < Vertex-Z (cm) < 80.0
Analysis Overview
- For each q = +/- particle in the reaction, all detected q = +/- tracks are tested as to whether or not they are that particle
- e.g. If a q = + track has PID FOM > 1% for both the π+ & K+: allow both combinations (DO NOT take the best FOM as true!)
- Maximum of 8 tracks per event (to cut down on memory spikes).
- The analysis (cuts/histing/kinfits) is then performed on each possible track combination (events are only cut if every one of their track combinations is cut):
- Required 45.0 < Track-Vertex-Z (cm) < 85.0
- Require the combined FOM for PID (χ2 and NDF of all tracks summed together) be > 1%
- Placed VERY wide cuts on the non-signal invariant mass peaks: reduces # of bogus track combinations to save time / cleanup histograms
- Where kinematic fit: Require that the confidence level from the kinematic fit be > 1%
Mass Peaks & Kinematic Fitting
genr8 φ3(1850) Signal
- Kinematic Fit Confidence Level (Zoomed in; spike at 0 confidence is well off the top of the plot)
| Recoil p | P4 KinFit | VertexP4 KinFit |
|---|---|---|
| Missing |  | |
| Not Missing |  |
- Missing Mass & Missing Mass Squared (Before/After KinFit)
| Recoil p | No KinFit | P4 KinFit | VertexP4 KinFit |
|---|---|---|---|
| Missing |  | ||
| Not Missing |
genr8 φ3(1850) Background
- Generate pions instead of kaons, shift generated mass peaks so that when the kaon mass is assigned to the kaon candidates (pions), the mass peaks shift to the original signal masses.
