[d2n-analysis-talk] [Fwd: Re: BigBite Farm Replay: MWDC variables]

[Gregg B. Franklin]

Seamus reports that 7 to 15% of the GEn events had good tracks and it 
depended on kinematics.  We didn't have a Cerenkov, but we had Big-Hand 
in coincidence. Probably hard to compare the two experiments.


-------- Original Message --------
Subject: Re: [d2n-analysis-talk] BigBite Farm Replay: MWDC variables
Date: Sun, 5 Dec 2010 19:19:05 -0500
From: Brad Sawatzky <brads at jlab.org>
To: d2n-analysis-talk at jlab.org

Forward to the list so others can comment.

-- Brad

On Sat, 04 Dec 2010, Diana Parno wrote:

> The ratio of events with tracks to events with no tracks seems to be
> pretty consistent with the runs I've looked at recently -- about
> 15.5%, give or take 0.1%, according to the cut summary. It will be
> very straightforward to plot this as a function of run number, so we
> can definitely keep an eye on its behavior.

Good. that should certainly be part of the 'sanity-check' histograms.

Do you recall if that 15.5% is comparible to what GEn ended up with?  I
would think that GEn should have been considerably worse than us because
they did not have a Cherenkov in the trigger.  I recall  there were a
huge amount of gammas firing the shower counter -- a lot (?) of those
inherently trackless triggers should have been suppressed in the T2
trigger.

-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
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   discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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-- 
Prof. Gregg B Franklin
Head, Department of Physics
Carnegie Mellon University
phone: (412) 268-2743   fax: (412) 681-0648