Re: [BLAST_ANAWARE] recrunch problems?

From: Michael Kohl (kohlm@mit.edu)
Date: Tue Oct 05 2004 - 23:56:15 EDT

Hi Adrian and others,

I am taking care of re-recrunching the recent hydrogen recrunch in order
to get the timing (and proton mass recon) straight. The re-recrunch
results will go into /scratch1/bud15/v3_4_1 and links will be established
in /net/data/4/Analysis/data/v3_4_1.

Regards,

  Michael

On Tue, 5 Oct 2004, Adrian T Sindile wrote:

> Hi!
> I just took a quick look at the newly recrunched H2 data (April,
> inbending) - recrunch was finished today, I believe. I am using the same
> cuts I used before recrunch - first observation, I am getting 470K elastic
> events compared to 514K events for the same range of runs, same cuts...
>
> In the first attached plot, I think the TOF hit distribution (for the
> selected tracks) looks weird... doesn't it?
> In the second plot, something is really bad about the reconstructed proton
> mass... especially in the right sector...
> The third plot might provide some explanation for this mess(?)... on the
> top pictures, you would expect two gaussians (e-p coplanarity). On
> the bottom pictures, the slope should be negative, from the same reason
> (when an electron hits high a paddle on the left, the corresponding proton
> should hit low another paddle on the right)...
>
> Maybe some definition changed in the reconstruction codes (a plus sign
> becoming minus, for example)? Maybe somebody can comment on these plots?
> Is everybody seeing what I am seeing?
> Thanks!
>
> Adrian
>
> -------------------------------
> Adrian Sindile
> Research Assistant
> Nuclear Physics Group
> University of New Hampshire
> phone: (603)862-1691
> FAX: (603)862-2998
> email: asindile@alberti.unh.edu
> http://einstein.unh.edu/~adrian/
> 

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