Attached is the presentation I gave at the collaboration meeting in late March. It was decided that before releasing a preliminary result, we would have to calculate the BEMC gain calibration uncertainty for 2006. A group of us at MIT created a plan for estimating this uncertainty (see here) and are currently working on implementing this plan as can be seen in Adam's blog post here:
http://drupal.star.bnl.gov/STAR/blog-entry/kocolosk/2009/apr/06/calib-uncertainty-update.
We hope to have a final estimate of this uncertainty by early next week. In that case, I can hopefully calculate the uncertainty in the cross section by the spin pwg meeting on 4/23. If this can be done, I will present the results then and ask to release the preliminary result for DIS 2009. If we cannot calculate a gain calibration systematic by 4/23, obviously we will not be asking to release the preliminary result.