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Hi Evgeny,</div>
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I do not ask strictly for 2 hadrons, I ask for two hadrons plus anything on top.</div>
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May be changing it will change the skim size.</div>
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We can discuss this skimming business later today during the meeting.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
Nick.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> burkert <burkert@jlab.org><br>
<b>Sent:</b> Wednesday, June 17, 2020 1:13 PM<br>
<b>To:</b> clas12_rgk@jlab.org <clas12_rgk@jlab.org>; Nikolay Markov <markov@jlab.org><br>
<b>Subject:</b> Re: [clas12_rgk] 2 pion cuts</font>
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<div class="PlainText">Evgeny,<br>
<br>
Is seems to me there are two typos in your selection (marked by arrow --->:)<br>
<br>
<br>
On 6/17/20 12:19 PM, golovach@jlab.org wrote:<br>
> Hi Nick,<br>
><br>
> MM2 cuts for the 2 pion events are:<br>
> The presence of extra electrons and neutrals are not taken into account.<br>
> if p, pi+ are present and there are no other hadrons,<br>
> then MM2(e_prot_pip)>-0.35 && MM2_e_prot_pip<0.35<br>
> if p, pi- are present and there are no other hadrons,<br>
> then MM2(e_prot_pim)>-0.35 && MM2_e_prot_pim<0.35<br>
<br>
> ---> if pi+, pi+ are present and there are no other hadrons,<br>
> then MM2(e_pip_pim)> 0.62 && MM2_e_pip_pim<1.18<br>
should that be: if pi+, pi- are present ......<br>
<br>
> ----> if p, pi+, pi+ are present and there are no other hadrons,<br>
> then MM2(e_prot_pip_pim)> -0.018 && MM2_e_prot_pip_pim<0.018<br>
<br>
should that be: if p, pi+, pi- are present,,<br>
<br>
<br>
Volker<br>
<br>
<br>
><br>
> Could you, produce train15 (say for the run 5898) for the test?<br>
><br>
><br>
> I do not understand one thing.<br>
> Annalisa has shown that the train eTwoChargedH takes 17% of the total size.<br>
><br>
> I have analyzed a subset of the dst files in<br>
> /lustre19/expphy/volatile/clas12/rg-k/production/pass0/v1_1.1.12/dst/recon/005898/<br>
> and I see much larger reduction of the number of the 2 pion events.<br>
> If I select 2 pion events I have only ~2% of the total number of events.<br>
> If I select 2 pion events and apply MM2 cuts I have ~0.88% of the total<br>
> number of events.<br>
> May be the MM2 cuts are not necessary?<br>
><br>
> My selection of the 2 pion events as I mentioned is:<br>
> The presence of extra electrons and neutrals are not taken into account.<br>
> p, pi+ are present and there are no other hadrons<br>
> p, pi- are present and there are no other hadrons<br>
> pi+, pi+ are present and there are no other hadrons<br>
> p, pi+, pi+ are present and there are no other hadrons<br>
><br>
> Evgeny<br>
><br>
><br>
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<br>
<br>
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