[Hps-analysis] MOUSE cuts

[Rafayel Paremuzyan]

Hi Miriam,

> The other MOUSE cuts on FinalStateParticles do indeed help cut out 
> FEEs from this collection.  In other words, the electron momentum cut 
> is just one of the cuts that discriminates against the FEEs, so if you 
> loosen it, you still won't have many FEEs sneaking in.
Thanks I agree with the above statement.

> all the FEEs are in the OtherElectrons collection.  There are no 
> momentum cuts on the OtherElectrons. 
A question about above statement:
There is a cut on the electron momentum for the "FinalStateParticles", 
and as I understand if electron passes
"FinalStateParticles" cuts, then there is no way it to be in the 
"OtherElectrons" in other word's
there is effectively a cut on "OtherElectrons" Is that right?

Now in this loose MOUSE cuts, I want to put this electron momentum cut 
high like 2.1 or high, and I think
this means in the "OtherElectrons" there will not be electrons below 2.1 
GeV, am I right?

If so, then what I am thinking "OtherElectrons" will not be very 
effective for FEE studies, since for FEEs analyzer
would like to have the whole (3\sigma+) of Gaussian part. Therefore In 
iss361, I put the electron momentum cut 2.6,
that all (most of) electrons will be in the "FinalStateParticles" 
collection.

> I thought I emphasized this several times in multiple summary talks, 
> but I'll state it again here: FinalStateParticles are for making V0s 
> out of. OtherElectrons are for FEEs and Mollers.
>
I understand this statement that "FinalStateParticles" are for v0s, and 
"OtherElectrons" for Moeller ans FEEs, however,
in my understanding loose cut on electron momentum in the 
"FinalStateParticles" doesn't allow to have All FEEs electrons to be in 
"OtherElectrons".

Rafo


On 12/9/18 8:14 PM, Diamond, Miriam wrote:
>
> Hi,
>
>
> V0s are made out of electrons and positrons in the FinalStateParticles 
> collection. There shouldn't be any FEEs at all in this collection -- 
> all the FEEs are in the OtherElectrons collection.  There are no 
> momentum cuts on the OtherElectrons.  Note, there is no overlap 
> between the FinalStateParticles collection and the OtherElectrons 
> collection.
>
>
> The other MOUSE cuts on FinalStateParticles do indeed help cut out 
> FEEs from this collection.  In other words, the electron momentum cut 
> is just one of the cuts that discriminates against the FEEs, so if you 
> loosen it, you still won't have many FEEs sneaking in.
>
>
> I thought I emphasized this several times in multiple summary talks, 
> but I'll state it again here: FinalStateParticles are for making V0s 
> out of. OtherElectrons are for FEEs and Mollers.
>
>
> -- Miriam
>
> ------------------------------------------------------------------------
> *From:* Nelson, Timothy Knight
> *Sent:* Wednesday, December 5, 2018 10:15:40 PM
> *To:* Rafayel Paremuzyan
> *Cc:* hps-analysis at jlab.org; Diamond, Miriam
> *Subject:* Re: [Hps-analysis] MOUSE cuts
> Thanks Rafo,
>
> I think these are the right questions.  Going a bit looser is OK as 
> long as it doesn’t blow up volume.  The key questions for me were:
>
> 1) I had thought there were more FEE contributing so that it would up 
> the V0 collection. The fact that this didn’t happen made me wonder 
> whether there was a problem somewhere in Rafo’s procedure relative to 
> how these cuts were supposed to be applied.
> 2) If it’s really true there are no FEE collected here, then isn’t 
> that a problem in itself?  I thought the OtherElectrons would be 
> useful for FEE studies.  Again… this doesn’t fit with what I expected 
> based on previous presentations.
>
> Hopefully Miriam can illuminate this when she comes up for air.
>
> Cheers,
> Tim
>
> > On Dec 4, 2018, at 12:43 PM, Rafayel Paremuzyan <rafopar at jlab.org> 
> wrote:
> >
> > Hi Miriam,
> >
> > Today in the analysis meeting, I was trying to justify that we can 
> loosen some of MOUSE cuts to be safer in the future analysis step,
> > while these cut loosening together increase number of events about 10%.
> >
> > There was comments that in particular making electron momentum 
> looser would pick up a lot of FEE events, making
> > file size to be significantly larger, however when I apply loose 
> MOUSE cuts on pass1 data (which doesn't have MOUSE cuts),
> > there is tiny contribution from FEE peak.
> >
> > I think this happens because other MOUSE cuts already cut out most 
> of FEE peaks (Mostly e-e+ be in opposite half and P_sum < 2.8 cuts),
> > however you are the best person to comment on this, whether the 
> figure shown in Slide 3 of the following document is reasonable for you?
> > 
> https://docs.google.com/presentation/d/1rZJZLh8H0QCzEUCnDxTxFjbMnRhoawH6rxMlTUxbzAs/edit?usp=sharing 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.google.com_presentation_d_1rZJZLh8H0QCzEUCnDxTxFjbMnRhoawH6rxMlTUxbzAs_edit-3Fusp-3Dsharing&d=DwMF-g&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=0HDJrGO9TZQTE97J9Abt2A&m=YFc2llMTWRBBMx2a3SENxP0V6jBW_KGnP3C-xca_imU&s=egcClPd12dF0PxTZUuBfk4X6Jowm-xgSUDtbWubSDeg&e=>
> >
> > In these slides blue histograms are from pass1, when I applied 
> loosened MOUSE cuts, and the red one represents tpass2 which is 
> reconstructed
> > with Original MOUSE cuts.
> >
> > Other's please comment, if I didn't describe questions accurately.
> >
> > Rafo
> > _______________________________________________
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>

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