Difference between revisions of "Recoil proton reconstruction"
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| Line 3: | Line 3: | ||
* Recoil proton kinematics | * Recoil proton kinematics | ||
| − | [[Image:p_eta_kin.png | | + | [[Image:p_eta_kin.png | 500px]] |
| − | # Proton polar angle versus proton | + | # Proton polar angle versus proton for generated events (top left) |
# Momentum distributions for generated and reconstructed protons as a function of the p generated momentum (top right) | # Momentum distributions for generated and reconstructed protons as a function of the p generated momentum (top right) | ||
| − | # Polar angle of reconstructed protons as a function of the | + | # Polar angle of reconstructed protons as a function of the generated proton momentum (middle left) |
# Chisq/Ndof for reconstructed protons (middle right) | # Chisq/Ndof for reconstructed protons (middle right) | ||
# Ndof distribution (bottom left) | # Ndof distribution (bottom left) | ||
| Line 15: | Line 15: | ||
* Proton momentum residuals | * Proton momentum residuals | ||
| − | [[Image:p_eta_presid_no_cut.png | | + | [[Image:p_eta_presid_no_cut.png | 250px]] |
No cuts | No cuts | ||
| − | [[Image:p_eta_presid_chi10.png | | + | [[Image:p_eta_presid_chi10.png | 250px]] |
Chisq/Ndof < 10 | Chisq/Ndof < 10 | ||
| + | p(rec) - p(gen) as a function of the genarted proton's momentum. | ||
| − | * | + | * Momentum resolution and reconstruction bias |
| − | [[Image:p_eta_mom_res.png | | + | [[Image:p_eta_mom_res.png | 300px]] |
| + | # Reconstruction bias (top). The mean value of residual distributions, < p_rec - p_gen >, | ||
| + | as a function of the proton generated momentum, p_gen. | ||
| + | # Energy resolution dp/p (bottom). | ||
| − | * | + | * Proton angle of reconstructed protons |
| − | [[Image:p_eta_theta_resid.png | | + | [[Image:p_eta_theta_resid.png | 300px]] |
| − | + | [[Image:p_eta_theta_res.png | 300px]] | |
| − | + | # Polar angle residuals | |
| − | + | # Polar angle resolution | |
| − | + | ||
| − | [[Image:p_eta_theta_res.png | | + | |
Revision as of 23:57, 1 October 2011
gamma p -> p eta decays
- Recoil proton kinematics
- Proton polar angle versus proton for generated events (top left)
- Momentum distributions for generated and reconstructed protons as a function of the p generated momentum (top right)
- Polar angle of reconstructed protons as a function of the generated proton momentum (middle left)
- Chisq/Ndof for reconstructed protons (middle right)
- Ndof distribution (bottom left)
- Ndof versus proton momentum (bottom right)
- Proton momentum residuals
No cuts
Chisq/Ndof < 10
p(rec) - p(gen) as a function of the genarted proton's momentum.
- Momentum resolution and reconstruction bias
- Reconstruction bias (top). The mean value of residual distributions, < p_rec - p_gen >,
as a function of the proton generated momentum, p_gen.
- Energy resolution dp/p (bottom).
- Proton angle of reconstructed protons
- Polar angle residuals
- Polar angle resolution
- Proton reconstruction efficiency
- Eta missing mass distribution
- Missing masses were computed for different momentum ranges of
generated protons. Reconstructed proton tracks were required to satisfy chi2/ndof < 10. The top left plot represents the missing mass distribution for all reconstructed protons.
gamma p -> p pi0 decays
- Recoil proton kinematics
- Proton polar angle versus proton momentum for generated events (top left)
- Momentum distributions for generated and reconstructed protons as a function of the p generated momentum (top right)
- Polar angle of reconstructed protons as a function of the proton generated momentum (middle left)
- Chisq/Ndof for reconstructed protons (middle right)
- Ndof distribution (bottom left)
- Ndof versus proton momentum (bottom right)
- Proton momentum and polar angle resolutions
- Reconstruction bias (top). The mean value of residuals, < p_rec - p_gen >, as a function of p_gen.
- Energy resolution dp/p (bottom). The distribution was fit to the function p1/sqrt(x) + p2
- Reconstruction bias (top). The mean value of residuals, < theta_rec - theta_gen >, as a function of theta_gen.
- Angular resolution sigma(theta) in degrees (bottom). The distribution was fit to the function p1/x + p2
- pi0 missing mass distribution
- Missing masses were computed for different momentum ranges of generated protons. Reconstructed proton tracks were required to satisfy chi2/ndof < 10. The top left plot represents the missing mass distribution for all reconstructed protons.
- Toy MC: pi0 missing mass distributions for various momentum and angular resolutions
- Missing mass distributions for pi0 and eta
