Difference between revisions of "Mattione Study b1pi"
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− | === | + | === π<sup>+</sup>'s === |
− | * 100000 generated events, 2 pi+'s per event: 200000 generated pi+'s | + | * 100000 generated events, 2 π<sup>+</sup>'s per event: 200000 generated π<sup>+</sup>'s |
− | * In thrown tree, the generated pi+'s are matched with XXX reconstructed pi+'s. | + | * In thrown tree, the generated π<sup>+</sup>'s are matched with XXX reconstructed π<sup>+</sup>'s. |
− | ** However, only XXX reconstructed | + | ** However, only XXX reconstructed π<sup>+</sup>'s in the "recon" tree! |
** Would expect at least 100000 - (200000 - XXX) = 74148 pi0 events, but get XXX events with 2+ photons instead | ** Would expect at least 100000 - (200000 - XXX) = 74148 pi0 events, but get XXX events with 2+ photons instead | ||
*** Matching suspect, so following distributions may be suspect as well. | *** Matching suspect, so following distributions may be suspect as well. | ||
− | * For each of the generated π<sup>+</sup>'s that were matched with reconstructed | + | * For each of the generated π<sup>+</sup>'s that were matched with reconstructed π<sup>+</sup>'s, the generated p vs theta distribution: |
− | [[Image: | + | [[Image:Mattione_b1piStudy_PiPluses_FoundGenPVsTheta.gif|thumb|left|600px]] |
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− | * For each of the generated | + | * For each of the generated π<sup>+</sup>'s that were matched with reconstructed π<sup>+</sup>'s, the reconstructed p vs theta distribution: |
− | [[Image: | + | [[Image:Mattione_b1piStudy_PiPluses_FoundReconPVsTheta.gif|thumb|left|600px]] |
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− | * For each of the generated | + | * For each of the generated π<sup>+</sup>'s that were NOT matched with reconstructed π<sup>+</sup>'s, the generated p vs theta distribution: |
− | [[Image: | + | [[Image:Mattione_b1piStudy_PiPluses_MissingGenPVsTheta.gif|thumb|left|600px]] |
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− | * For each of the generated | + | * For each of the generated π<sup>+</sup>'s that were matched with reconstructed π<sup>+</sup>'s, delta-p (generated - reconstructed) vs generated p: |
− | [[Image: | + | [[Image:Mattione_b1piStudy_PiPluses_DeltaPVsP.gif|thumb|left|600px|delta-p (generated - reconstructed) vs generated p]] |
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Revision as of 13:33, 23 May 2011
- Generated 100000 X(2000) -> b1pi events following the instructions here.
- Decay chain:
gamma p -> p X(2000)0 | |-> b1(1235)+ pi- | |-> omega pi+ | |-> rho0 pi0 | |-> gamma gamma | |-> pi+ pi-
Contents
Event Count
# Generated events = 100000 # Events with 2+ photons = 57866 # Events with 2+ pi+ = 29372 # Events with 2+ pi- = 30634 # Events with enough tracks for the X (2+ photons, 2+ pi+'s, 2+ pi-'s) = 4760 # Events with at least one pi0 candidate: 57866 # Events with at least one rho0 candidate: 58466 # Events with at least one omega candidate: 31012 # Events with at least one bi+ candidate: 12163 # Events with at least one X(2000)0 candidate: 4760
Invariant Masses
- Pi0: Filled for all events with > 1 photon, filled for all possible photon combinations (so if three photons in an event, will fill 3 times).
- Rho0: Filled for all events with at least one pi+ and at least one pi-, filled for all possible pion combinations (so if two pi+'s and two pi-'s in an event, will fill 4 times).
- Omega: Filled for all events with at least: one pi+, one pi-, and two photons. Filled for all possible rho combinations, but for events with multiple pi0 candidates the pi0 with the closest mass is chosen (got lazy).
- B1+: Filled for all events with at least: two pi+, one pi-, and two photons. Filled for all possible combinations of these tracks (regardless of which pi+ formed the Rho0).
- X(2000)0: Filled for all events with at least: two pi+, two pi-, and two photons. Filled for all possible combinations of these tracks (regardless of which pi+ & pi- formed the Rho0).
Comparison of Generated and Reconstructed Tracks
Photons
- 100000 generated events, 2 photons per event: 200000 generated photons
- In thrown tree, the generated photons are matched with 174148 reconstructed photons.
- However, only 170870 reconstructed photons in the "recon" tree!
- Would expect at least 100000 - (200000 - 174148) = 74148 pi0 events, but get 57866 events with 2+ photons instead
- Matching suspect, so following distributions may be suspect as well.
- For each of the generated photons that were matched with reconstructed photons, the generated p vs theta distribution:
- For each of the generated photons that were matched with reconstructed photons, the reconstructed p vs theta distribution:
- For each of the generated photons that were NOT matched with reconstructed photons, the generated p vs theta distribution:
- For each of the generated photons that were matched with reconstructed photons, delta-p (generated - reconstructed) vs generated p:
π+'s
- 100000 generated events, 2 π+'s per event: 200000 generated π+'s
- In thrown tree, the generated π+'s are matched with XXX reconstructed π+'s.
- However, only XXX reconstructed π+'s in the "recon" tree!
- Would expect at least 100000 - (200000 - XXX) = 74148 pi0 events, but get XXX events with 2+ photons instead
- Matching suspect, so following distributions may be suspect as well.
- For each of the generated π+'s that were matched with reconstructed π+'s, the generated p vs theta distribution:
- For each of the generated π+'s that were matched with reconstructed π+'s, the reconstructed p vs theta distribution:
- For each of the generated π+'s that were NOT matched with reconstructed π+'s, the generated p vs theta distribution:
- For each of the generated π+'s that were matched with reconstructed π+'s, delta-p (generated - reconstructed) vs generated p: