Minutes of the 2006/04/26 analysis meeting

From: Michael Kohl (kohlm@mit.edu)
Date: Wed Apr 26 2006 - 17:28:22 EDT


Hi,

here are the minutes of today's analysis meeting.

Attending DH,RM,KD,JC,OF,RF,AD,BT,MK,CC(speakerphone).

-Status ep elastic analysis (CC)
  +See ppt
  +Now based on v3_4_18
  +Polarization product slightly larger than before
  +"dip" near 0.3 (GeV/c)^2 still present - related to spin angle?
  +Analysis performed with constant spin angle
  +Use map instead to extract observables

-Status spin angle analysis
  +New extraction of average spin angle from ep changed from 47.5+-0.8
   to now 45.8 (!!) degrees using the Hoehler parametrization.
  +Is now consistent with June2005 survey value (46.2)
  +Reason is mostly due to new geometry which causes a slight shift in
   theta_e
  +ed-elastic analysis of spin angle is awaited (CZ)
  +New results to be confirmed by d(e,e'p)
  +Spin angle profile by Doug to be used

-Status Mascarad in Blast/Dgen
  +Factor three discrepancy between original Mascarad and DGen

-Status missing forward angles in quasielastic MC
  +Almost no events below 26 degrees
  +Research in progress

Regards,

    Michael

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