Difference between revisions of "Recoil proton reconstruction"

From GlueXWiki
Jump to: navigation, search
Line 42: Line 42:
  
  
* Eta missing mass
+
* Eta missing mass distribution
 
[[Image:p_eta_mis_mas.png | 300px]]
 
[[Image:p_eta_mis_mas.png | 300px]]
 +
#Distributions were computed for different momentum ranges of
 +
generated protons. Reconstructed proton tracks were required to
 +
satisfy chi2/ndof < 10.

Revision as of 20:58, 1 October 2011

gamma p -> p eta decays

  • Recoil proton kinematics

P eta kin.png

  1. Proton polar angle versus proton momentum for generated events (top left)
  2. Momentum distributions for generated and reconstructed protons as a function of the p generated momentum (top right)
  3. Polar angle of reconstructed protons as a function of the proton generated momentum (middle left)
  4. Chisq/Ndof for reconstructed protons (middle right)
  5. Ndof distribution (bottom left)
  6. Ndof versus proton momentum (bottom right)


  • Proton momentum residuals

P eta presid no cut.png No cuts P eta presid chi10.png Chisq/Ndof < 10


  • Proton momentum resolution and reconstruction bias

P eta mom res.png


  • Polar angle residuals

P eta theta resid.png


  • Polar angle resolution

P eta theta res.png


  • Proton reconstruction efficiency

P eta rec eff.png


  • Eta missing mass distribution

P eta mis mas.png

  1. Distributions were computed for different momentum ranges of

generated protons. Reconstructed proton tracks were required to satisfy chi2/ndof < 10.