[G14_run] mmass vs polar angle

[Irene Zonta]

Hi Eugene,
the plots refers to the reaction gamma d -> pi- p p ,where we imposed the detection of 1 piminus and 2 protons by using a cut around 0 on the gamma d -> pi- p p Missing Mass. 
I then plotted the missing mass for gamma d -> pi- p (X)  which then should correspond to the other proton, as a function of the polar angle of the missing proton. The reference frame is the lab. 
Do you want me to repeat the procedure for the missing pion? Or do you want to see the missing mass versus the measured angles instead of the missing ones?

Irene

On Apr 24, 2014, at 4:00 PM, Eugene Pasyuk <pasyuk at jlab.org> wrote:

> Hi Irene,
> 
> Looks nice. A couple of questions.
> For which particle is this angle or you put both pion and proton angle in the same histogram? Is it the lab angle or center of mass angle? It would be good to see this in a lab frame separately for pion angle and for proton angle. Can you do this?
> 
> Thanks,
> 
> -Eugene
> 
> From: "Irene Zonta" <irene.zonta at roma2.infn.it>
> To: "A.M. Sandorfi" <sandorfi at jlab.org>, pasyuk at jlab.org, "Annalisa D'Angelo" <annalisa.dangelo at roma2.infn.it>, daoh at andrew.cmu.edu, "Peng Peng" <pp9e at virginia.edu>, hlu at jlab.org
> Cc: "g14 run" <g14_run at jlab.org>
> Sent: Thursday, April 24, 2014 9:33:36 AM
> Subject: mmass vs polar angle
> 
> Dear all,
> here is the result of the test that Eugene asked for, form the reaction gamma d -> pi- p (X). It looks like the correction is appropriate for every angle.
> 
> Cheers
> 
> Irene
> 

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