oop_offset

OOP offset for final ntuples 03/16/06

Previously, the out-of-plane offset was determined from the Hee'p analysis. This was the variable dssxptar in the second table at this link.

One change was required. The HMS oop offsets were not included in this analysis. This is set in hmsflags.param, and from Tanja's analysis, this is 1.1 mrad.

h_oopcentral_offset = 0.0011 ; (rad) Based on Tanja's optics work

The Hee'p dssxptar offset was recalculated and a new parameterization was determined.

parameterization 0.00561+0.0000331*exp(x**2.959)

P_SOS (GeV)
1.7227
1.6868
1.588
0.874

dssxptar (heep)
0.01053
0.00924
0.0073
0.00568

dssxptar (parameterzation)
0.01052
0.009241
0.00729
0.005675

The new parameterization was added to s_physics.f

ssxp_tar_temp = ssxp_tar_temp
& - (0.00561+0.0000331*exp(abs(spcentral)**2.959)) !3/16/06

and c_physics.f

         xp_h_tar = xp_h_tar
     &        - (0.00561+0.0000331*exp(abs(spcentral)**2.959)) !3/16/06
...
         xp_e_tar = xp_e_tar
     &        - (0.00561+0.0000331*exp(abs(spcentral)**2.959)) !3/16/06