Re: [BLAST_ANAWARE] recrunch problems?

From: Adrian T Sindile (asindile@cisunix.unh.edu)
Date: Tue Oct 05 2004 - 18:32:23 EDT


Oops!
The first plot should have been the one I am attaching in this message...
in my last email, I attached the third plot twice.
Sorry about the confusion...

Adrian

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/
>

-- 

------------------------------- 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/


recrunchTOFhits.gif



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