[G8b_run] Good News: Tagger Sag and Momentum Corrections

[Eugene Pasyuk]

Just to make sure. We have a meeting tomorrow at noon EDT, right?

-Eugene


On Wed, 2009-10-21 at 16:40 +0100, Ken Livingston wrote:
> Hi Volker,
> Deep joy! Talk to you tomorrow.
> 
> Cheers,
> Ken
> 
> 
> Volker Crede wrote:
> > Hi all,
> >
> > very good news: we have finally obtained very reasonable results from 
> > the kinematic fitter. The updated pictures in the attachment are 
> > similar to those Charles sent out on Monday. The typical tagger sag 
> > plot (on page 1) shows a flat energy dependence after applying Mike's 
> > energy correction. Also, the pulls look good and the large 
> > displacements have disappeared.
> >
> > We have been quite wrong earlier this week; we entirely underestimated 
> > the effects of an energy-dependent energy correction and many thanks 
> > to Mike for asking us to apply his polynomial. Most of the issues Ken 
> > raised in yesterday's email receive now satisfying answers. The pulls 
> > look quite reasonable now and compare very well with Mike Williams 
> > results for the g10 data (see table on page 3). It looks like we have 
> > the systematics of the g8b data under control. The justification now 
> > for not applying pion momentum corrections is that we don't observe 
> > problems with the measured momenta.
> >
> > Best wishes and talk to you tomorrow in the meeting
> >
> >    Volker & Chuck
> >
> > ----------------------------------
> >
> > Volker Crede
> > Assistant Professor
> > Florida State University
> > Department of Physics
> > 206 Keen Building
> > Tallahassee, FL  32306  USA
> >
> > Phone: 001 850 644-2423
> > Fax: 001 850 644-4478
> > crede at fsu.edu
> > ------------------------------------------------------------------------
> >
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>