[clas12_rgk] 2 pion cuts

[golovach at jlab.org]

Dear Volker,

I do no see the typos
the first arrow ---> pi+, pi+ are present
the second arrow ----> p, pi+, pi+ are present
That is correct.
  Evgeny


> Evgeny,
>
> Is seems to me there are two typos in your selection (marked by arrow
> --->:)
>
>
> On 6/17/20 12:19 PM, golovach at jlab.org wrote:
>> Hi Nick,
>>
>> MM2 cuts for the 2 pion events are:
>> The presence of extra electrons and neutrals are not taken into account.
>> if p, pi+   are present and there are no other hadrons,
>>    then  MM2(e_prot_pip)>-0.35 && MM2_e_prot_pip<0.35
>> if p, pi-   are present and there are no other hadrons,
>>    then  MM2(e_prot_pim)>-0.35 && MM2_e_prot_pim<0.35
>
>> ---> if pi+, pi+ are present and there are no other hadrons,
>>    then  MM2(e_pip_pim)> 0.62 && MM2_e_pip_pim<1.18
> should that be: if pi+, pi- are present ......
>
>> ----> if p, pi+, pi+ are present and there are no other hadrons,
>>    then  MM2(e_prot_pip_pim)> -0.018 && MM2_e_prot_pip_pim<0.018
>
> should that be: if  p, pi+, pi- are present,,
>
>
> Volker
>
>
>>
>> Could you, produce train15 (say for the run 5898) for the test?
>>
>>
>> I do not understand one thing.
>> Annalisa has shown that the train eTwoChargedH takes 17% of the total
>> size.
>>
>> I have analyzed a subset of the dst files in
>> /lustre19/expphy/volatile/clas12/rg-k/production/pass0/v1_1.1.12/dst/recon/005898/
>> and I see much larger reduction of the number of the 2 pion events.
>> If I select 2 pion events I have only ~2% of the total number of events.
>> If I select 2 pion events and apply MM2 cuts I have ~0.88% of the total
>> number of events.
>> May be the MM2 cuts are not necessary?
>>
>> My selection of the 2 pion events as I mentioned is:
>>    The presence of extra electrons and neutrals are not taken into
>> account.
>>    p, pi+   are present and there are no other hadrons
>>    p, pi-   are present and there are no other hadrons
>>    pi+, pi+ are present and there are no other hadrons
>>    p, pi+, pi+ are present and there are no other hadrons
>>
>>    Evgeny
>>
>>
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>
>
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