User name Olivier
Log entry time 20:22:25 on November14,2000
Entry number 52093
keyword=Theta offset fixed
The offset observed in the vertical angle in the HRS (see HALOG #51733 and 51737) was caused by a difference in the offsets in the x-direction of the VDC planes (remember, for ESPACE, the electron side does not see the same VDC than before the summer). The corresponding lines in the database of ESPACE were swapped, and it takes care of it.
Here is (at 5.6 GeV2) a plot of theta_th when cut on the central row of the calorimeter (was centered on -12mrd before).
Thanks Mark and Nilanga !