[Tpe] tpe meeting today

[Bennett, Robert P.]

Hi Franz, 

         I think it is because there is a cut in fill_seb_ntn.F.  I posted the number of events passing the cuts (dcstat>0 and npart>2) at the bottom of the page

https://clasweb.jlab.org/rungroups/tpe/wiki/index.php/Analysis_of_new_HBT_files

It looks like the npart>1 cut is what is killing us.   

Our nomenclature is:
Old Method : ntuples created by User_ana->Recsis->fill_seb_ntn.F
New Method: ntuples created by nt10maker on cooked BOS files

So, I think that brings me to the next question, if npart = charged particles after time-based tracking + neutral clusters,  
what goes into time-based tracking?

Regards,

Robert



________________________________________
From: tpe-bounces at jlab.org [tpe-bounces at jlab.org] On Behalf Of Bennett, Robert P. [rbennett at odu.edu]
Sent: Monday, February 27, 2012 12:40 PM
To: Weinstein, Lawrence B.
Cc: tpe
Subject: Re: [Tpe] tpe meeting today

Hi Larry,
              Franz is helping me out with this.  This is an email he sent me over the weekend.



##################################################
Robert,
in the seb code there is a distinction between 'number of final reconstructed
particles'=npart (for usual cooking: charged particles after time-based
tracking+neutral clusters) and 'number of geometrically reconstructed
particles'=gpart, which means any matching between infos of SC+EC or SC+DC etc.
I think your presumption is correct: since the proton is going forward, seb regarded
that as the lepton (e+,e-) that defines the timing, what I don't understand right
now: why was the positron thrown out in time-based tracking (ok, it might have
gotten a beta~1.2 or 1.4 but years ago a put a stupid condition into trk_dcam:
if(beta<=0) beta=0.3; if(beta>1.2) beta=1.2; because otherwise lots of tracks get
lost if the time calibration is off)
... the easiest way to find out: send me some of those events, and I look into it.

Greetings
Franz

==============================
Franz J. Klein
Associate Professor
Physics Department
The Catholic University of America
Hannan Hall, Rm. 206
phone: 202-319-6190; fax: 202-319-4448
==============================



+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++





________________________________________
From: Larry Weinstein [lweinste at odu.edu]
Sent: Monday, February 27, 2012 12:36 PM
To: Bennett, Robert P.
Cc: tpe
Subject: Re: [Tpe] tpe meeting today

Dear Rob,

Did you find out what else goes into the definition of npart?

- Larry

Bennett, Robert P. wrote:
> Hi Larry,
>
>        The main thing I wanted to show today is a study of all of the cuts on the nt10maker ntuples.  I  am able to get back our original ratios (via user_ana ->  fill_seb.F) the combination
> dc_stat>0 and npart>1.  I seem to lose one or two tracks here and there, but otherwise, I think this really shows the culprit.   I'm happy to go over it today or Thursday.
>
> The table can be found under the heading "Analysis of Data Selection" on the Analysis of new HBT fiels page
>
> https://clasweb.jlab.org/rungroups/tpe/wiki/index.php/Analysis_of_new_HBT_files
>
>
> Regards,
> Robert
>
> ________________________________________
> From: tpe-bounces at jlab.org [tpe-bounces at jlab.org] On Behalf Of Larry Weinstein [lweinste at odu.edu]
> Sent: Monday, February 27, 2012 11:35 AM
> To: tpe
> Subject: [Tpe] tpe meeting today
>
> Dear Folks,
>
> Are we having a TPE meeting today?  We met Friday at the collaboration
> meeting.  Please let me know if you have anything new to present.
>
> If we do meet, I would like to move the meeting to 4:00 today.
>
> --
>                                  Sincerely,
>                                  Larry
>
> -----------------------------------------------------------
> Lawrence Weinstein
> University Professor
> Physics Department
> Old Dominion University
> Norfolk, VA 23529
> 757 683 5803
> 757 683 3038 (fax)
> weinstein at odu.edu
> http://www.lions.odu.edu/~lweinste/
>
> _______________________________________________
> Tpe mailing list
> Tpe at jlab.org
> https://mailman.jlab.org/mailman/listinfo/tpe
>
>
> --

--
                                Sincerely,
                                Larry

-----------------------------------------------------------
Lawrence Weinstein
University Professor
Physics Department
Old Dominion University
Norfolk, VA 23529
757 683 5803
757 683 3038 (fax)
weinstein at odu.edu
http://www.lions.odu.edu/~lweinste/


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