<div dir="ltr"><div dir="ltr">Dear Silvia<div><br></div><div>In my experience exclusive reactions have very few misidentified particles</div><div>For instance SIDIS kaons are almost 1 to 1 with fake background from pion, but once applying exclusivity cuts the pions are hardly even measurable, at the percent level </div><div><br></div><div>Whether the output size is acceptable or not, two orders of magnitude will still affect the processing / analysis time</div><div><br></div><div>Best regards</div><div>FX</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 13, 2020 at 8:26 PM <<a href="mailto:silvia@jlab.org">silvia@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi FX,<br>
There are a lot of "fake neutrals" in the data - see for instance the talk<br>
of Cole of the other day - and the nDVCS filter asks for neutrals, so this<br>
may be why it is so much bigger than in RGA.<br>
In any case, the pass1 review committee asks that trains don't exceed 20%,<br>
we made it for the spring data and we're going to do it for the Fall ones<br>
as well. We're working with Raffaella to make new custom wagons leading to<br>
trains with appropriate size.<br>
I'll provide more infos on the outcome of this next Monday.<br>
Have a good weekend, everyone!<br>
Silvia<br>
<br>
> I don't have the precise number but I the DVCS wagon output on proton<br>
> target was 0.1%<br>
><br>
> At 13% it certain there is a problem, I believe<br>
><br>
> On Fri, Nov 13, 2020, 20:00 <<a href="mailto:silvia@jlab.org" target="_blank">silvia@jlab.org</a>> wrote:<br>
><br>
>> Hello all,<br>
>> I'll clarify a few more things to reply to various comments raised in<br>
>> thsi<br>
>> thread:<br>
>> - I never said inclusive is 60% of the total. I said (you can check my<br>
>> slides at the review) that TRAINS are 60% of the cooked file, and<br>
>> inclusive is 75% of the trains. This is the info Zhiwen passed me before<br>
>> the review. The trains were 20% of the cooked data in the spring.<br>
>> - the train we call "ndvcs" also includes pdvcs<br>
>> - we are planning to put a Q2 cut, as I said previously, to reduce the<br>
>> dvcs train size.<br>
>><br>
>> FX, we haven't analyzed yet any of these outbending data (as no cooking<br>
>> besides calibration one was done), so I don't have a reply to your last<br>
>> question yet.<br>
>><br>
>> Best regards,<br>
>> Silvia<br>
>><br>
>><br>
>> > It looks to me like that ndvcs number is much too high. What is the<br>
>> final<br>
>> > fraction after the analysis is complete?<br>
>> ><br>
>> > On Fri, Nov 13, 2020, 19:24 Zhiwen zhao <<a href="mailto:zwzhao@jlab.org" target="_blank">zwzhao@jlab.org</a>> wrote:<br>
>> ><br>
>> >> Dear All<br>
>> >><br>
>> >> Just to clarify some numbers<br>
>> >><br>
>> >> for fall2019 outbending run, the current skim size in percent are<br>
>> >><br>
>> >> dst 100<br>
>> >> inc 39<br>
>> >> ndvcs 14<br>
>> >> edeut 8<br>
>> >> two 4<br>
>> >> jpsi 1<br>
>> >><br>
>> >> Zhiwen<br>
>> >><br>
>> >> ------------------------------<br>
>> >> *From:* Clas12_rgb <<a href="mailto:clas12_rgb-bounces@jlab.org" target="_blank">clas12_rgb-bounces@jlab.org</a>> on behalf of Harut<br>
>> >> Avagyan <<a href="mailto:avakian@jlab.org" target="_blank">avakian@jlab.org</a>><br>
>> >> *Sent:* Friday, November 13, 2020 1:09 PM<br>
>> >> *To:* <a href="mailto:clas12_rgb@jlab.org" target="_blank">clas12_rgb@jlab.org</a> <<a href="mailto:clas12_rgb@jlab.org" target="_blank">clas12_rgb@jlab.org</a>><br>
>> >> *Subject:* Re: [Clas12_rgb] trains redefinition - feedback needed<br>
>> >><br>
>> >> Hi Silvia,<br>
>> >><br>
>> >> We had some exchanges with Zhiwen. According to him the inclusive<br>
>> skim<br>
>> >> size is 40% of dst for the outbending runs, not sure where that 60%<br>
>> >> came.<br>
>> >><br>
>> >> In case we drop the inclusive skim, decision should be made not just<br>
>> on<br>
>> >> the basis of the space, but also the time of the analysis, which will<br>
>> be<br>
>> >> obviously significant.<br>
>> >><br>
>> >> In addition, in case we drop the inclusive skim, which was so far<br>
>> used<br>
>> >> in SIDIS, we will need e'hX skims, which will be only about a factor<br>
>> of<br>
>> >> 1.5-2 smaller.<br>
>> >><br>
>> >> Regards,<br>
>> >><br>
>> >> Harut<br>
>> >><br>
>> >> On 11/13/2020 11:42 AM, Silvia Niccolai wrote:<br>
>> >> > Hi Stepan,<br>
>> >> > Yes, we’ll go that way, and drop the inclusive train. We are<br>
>> >> studying<br>
>> >> how to modify the dvcs skim to also be compatible with the<br>
>> requirements<br>
>> >> of<br>
>> >> the Gmn analysis.<br>
>> >> > Best regards,<br>
>> >> > Silvia<br>
>> >> ><br>
>> >> > Sent from my iPhone<br>
>> >> ><br>
>> >> >> On 13 Nov 2020, at 17:09, Stepan Stepanyan <<a href="mailto:stepanya@jlab.org" target="_blank">stepanya@jlab.org</a>><br>
>> wrote:<br>
>> >> >><br>
>> >> >> Dear Silvia,<br>
>> >> >><br>
>> >> >> I am not the one who requested the inclusive skim, but if my skim<br>
>> >> will<br>
>> >> be 60% of the DSTs I rather run my analysis off DSTs. So, decision to<br>
>> >> drop<br>
>> >> the inclusive skim seems is the right one.<br>
>> >> >><br>
>> >> >> My two cents.<br>
>> >> >><br>
>> >> >> Regards, Stepan<br>
>> >> >><br>
>> >> >>> On Nov 13, 2020, at 8:02 AM, <a href="mailto:silvia@jlab.org" target="_blank">silvia@jlab.org</a> wrote:<br>
>> >> >>><br>
>> >> >>> Dear all,<br>
>> >> >>> one of the two recommendation of the RG-B Fall review is to<br>
>> reduce<br>
>> >> >>> considerably the size of our trains. Due to the much higher rates<br>
>> at<br>
>> >> low<br>
>> >> >>> Q2 of the outbending Fall data, compared to the Spring ones, our<br>
>> >> inclusive<br>
>> >> >>> train is too big. Our trains are in total 60% of the size of the<br>
>> >> cooked<br>
>> >> >>> run, and the inclusive train makes up for 75% of this. The<br>
>> committee<br>
>> >> >>> recommends to scale down the skims size to no more than 20% of<br>
>> the<br>
>> >> cooked<br>
>> >> >>> files.<br>
>> >> >>> We are therefore planning to remove this train. If people really<br>
>> >> need<br>
>> >> >>> this, please let us know, and we can discuss and find out if it<br>
>> is<br>
>> >> >>> possible to find some additional cuts to include in order to make<br>
>> it<br>
>> >> >>> bearable.<br>
>> >> >>> We are also planning to add a Q2>1 cut to the DVCS train to<br>
>> reduce<br>
>> >> its<br>
>> >> size.<br>
>> >> >>> Please get in touch as soon as possible if you have objections or<br>
>> >> comments<br>
>> >> >>> on this plan. I'd like to send a reply to the committee by this<br>
>> >> evening<br>
>> >> >>> (EU time).<br>
>> >> >>> Thanks a lot and best regards,<br>
>> >> >>> Silvia<br>
>> >> >>><br>
>> >> >>><br>
>> >> >>> _______________________________________________<br>
>> >> >>> Clas12_rgb mailing list<br>
>> >> >>> <a href="mailto:Clas12_rgb@jlab.org" target="_blank">Clas12_rgb@jlab.org</a><br>
>> >> >>> <a href="https://mailman.jlab.org/mailman/listinfo/clas12_rgb" rel="noreferrer" target="_blank">https://mailman.jlab.org/mailman/listinfo/clas12_rgb</a><br>
>> >> ><br>
>> >> > _______________________________________________<br>
>> >> > Clas12_rgb mailing list<br>
>> >> > <a href="mailto:Clas12_rgb@jlab.org" target="_blank">Clas12_rgb@jlab.org</a><br>
>> >> > <a href="https://mailman.jlab.org/mailman/listinfo/clas12_rgb" rel="noreferrer" target="_blank">https://mailman.jlab.org/mailman/listinfo/clas12_rgb</a><br>
>> >> _______________________________________________<br>
>> >> Clas12_rgb mailing list<br>
>> >> <a href="mailto:Clas12_rgb@jlab.org" target="_blank">Clas12_rgb@jlab.org</a><br>
>> >> <a href="https://mailman.jlab.org/mailman/listinfo/clas12_rgb" rel="noreferrer" target="_blank">https://mailman.jlab.org/mailman/listinfo/clas12_rgb</a><br>
>> >> _______________________________________________<br>
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>> >> <a href="mailto:Clas12_rgb@jlab.org" target="_blank">Clas12_rgb@jlab.org</a><br>
>> >> <a href="https://mailman.jlab.org/mailman/listinfo/clas12_rgb" rel="noreferrer" target="_blank">https://mailman.jlab.org/mailman/listinfo/clas12_rgb</a><br>
>> >><br>
>> > _______________________________________________<br>
>> > Clas12_rgb mailing list<br>
>> > <a href="mailto:Clas12_rgb@jlab.org" target="_blank">Clas12_rgb@jlab.org</a><br>
>> > <a href="https://mailman.jlab.org/mailman/listinfo/clas12_rgb" rel="noreferrer" target="_blank">https://mailman.jlab.org/mailman/listinfo/clas12_rgb</a><br>
>> ><br>
>><br>
>><br>
>><br>
><br>
<br>
<br>
</blockquote></div></div>