[Clas12_rgb] trains redefinition - feedback needed

[Zhiwen zhao]

Dear All

Just to clarify some numbers

for fall2019 outbending run, the current skim size in percent are

dst         100
inc         39
ndvcs    14
edeut      8
two          4
jpsi          1

Zhiwen

________________________________
From: Clas12_rgb <clas12_rgb-bounces at jlab.org> on behalf of Harut Avagyan <avakian at jlab.org>
Sent: Friday, November 13, 2020 1:09 PM
To: clas12_rgb at jlab.org <clas12_rgb at jlab.org>
Subject: Re: [Clas12_rgb] trains redefinition - feedback needed

Hi Silvia,

We had some exchanges with Zhiwen. According to him the inclusive skim
size is 40% of dst for the outbending runs, not sure where that 60% came.

In case we drop the inclusive skim, decision should be made not just on
the basis of the space, but also the time of the analysis, which will be
obviously significant.

In addition, in case we drop the inclusive skim, which was so far used
in SIDIS, we will need e'hX skims, which will be only about a factor of
1.5-2 smaller.

Regards,

Harut

On 11/13/2020 11:42 AM, Silvia Niccolai wrote:
> Hi Stepan,
> Yes, we’ll go that way, and drop the inclusive train. We are studying how to modify the dvcs skim to also be compatible with the requirements of the Gmn analysis.
> Best regards,
> Silvia
>
> Sent from my iPhone
>
>> On 13 Nov 2020, at 17:09, Stepan Stepanyan <stepanya at jlab.org> wrote:
>>
>> Dear Silvia,
>>
>> I am not the one who requested the inclusive skim, but if my skim will be 60% of the DSTs I rather run my analysis off DSTs. So, decision to drop the inclusive skim seems is the right one.
>>
>> My two cents.
>>
>> Regards, Stepan
>>
>>> On Nov 13, 2020, at 8:02 AM, silvia at jlab.org wrote:
>>>
>>> Dear all,
>>> one of the two recommendation of the RG-B Fall review is to reduce
>>> considerably the size of our trains. Due to the much higher rates at low
>>> Q2 of the outbending Fall data, compared to the Spring ones, our inclusive
>>> train is too big. Our trains are in total 60% of the size of the cooked
>>> run, and the inclusive train makes up for 75% of this. The committee
>>> recommends to scale down the skims size to no more than 20% of the cooked
>>> files.
>>> We are therefore planning to remove this train. If people really need
>>> this, please let us know, and we can discuss and find out if it is
>>> possible to find some additional cuts to include in order to make it
>>> bearable.
>>> We are also planning to add a Q2>1 cut to the DVCS train to reduce its size.
>>> Please get in touch as soon as possible if you have objections or comments
>>> on this plan. I'd like to send a reply to the committee by this evening
>>> (EU time).
>>> Thanks a lot and best regards,
>>> Silvia
>>>
>>>
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>>> Clas12_rgb at jlab.org
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>
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