hi adrian,
i made a mixup when i wrote the new offsets to the database, and
forgot to add in the offsets from blast.sc_cal~1.15~ from which my own
offsets were based. therefore, we must do a recrunch, probably from
dst. perhaps before we do that chi could fix the problem with 'ep_skim'
in lrd. for the time being he turned it off, since it wansn't working.
runs were taking 10x longer to crunch with it included.
--chris
Adrian T Sindile wrote:
> 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/
>>
>
>
> ------------------------------------------------------------------------
>
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