Difference between revisions of "Recoil proton reconstruction"
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* Proton momentum residuals | * Proton momentum residuals | ||
| − | [[Image:p_eta_presid_no_cut.png | | + | [[Image:p_eta_presid_no_cut.png | 300px]] |
No cuts | No cuts | ||
| − | [[Image:p_eta_presid_chi10.png | | + | [[Image:p_eta_presid_chi10.png | 300px]] |
Chisq/Ndof < 10 | Chisq/Ndof < 10 | ||
p(rec) - p(gen) as a function of the genarted proton's momentum. | p(rec) - p(gen) as a function of the genarted proton's momentum. | ||
| + | |||
| + | |||
| + | |||
* Momentum resolution and reconstruction bias | * Momentum resolution and reconstruction bias | ||
| − | [[Image:p_eta_mom_res.png | | + | [[Image:p_eta_mom_res.png | 350px]] |
| − | # Reconstruction bias (top). The mean value of residual distributions, < p_rec - p_gen >, | + | # Reconstruction bias (top). The mean value of residual distributions, < p_rec - p_gen >, as a function of the proton generated momentum, p_gen. |
| − | as a function of the proton generated momentum, p_gen. | + | |
# Energy resolution dp/p (bottom). | # Energy resolution dp/p (bottom). | ||
| + | |||
| Line 33: | Line 36: | ||
* Proton angle of reconstructed protons | * Proton angle of reconstructed protons | ||
[[Image:p_eta_theta_resid.png | 300px]] | [[Image:p_eta_theta_resid.png | 300px]] | ||
| − | [[Image:p_eta_theta_res.png | 300px]] | + | [[Image:p_eta_theta_res.png |right| 300px]] |
# Polar angle residuals | # Polar angle residuals | ||
# Polar angle resolution | # Polar angle resolution | ||
Revision as of 00:01, 2 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
