[clas12_rgk] Selected RGK runs for calibration

Mon May 27 16:05:32 EDT 2019

Dear All,
I completed the comparison of run 5038, cooked with 6b.1.1 and 6b.2.0, focusing on the vertex reconstruction for forward tracks where we can expect to see improvements from the new vertex reconstruction implemented by Veronique based on the swim-to-line approach. I collected some relevant plots in the attached slides:
- the improvement on the vertex resolution is visible comparing the RMS (or fit sigma) of the vertex distribution plots on the first slide; the effect is very significant for positive hadrons where angles are smaller;
- the better vertex determination has a positive effect on the path length and consequently on the vertex time distribution on the second slide: the RMS of the distributions are smaller in particular for protons (red histogram) where the tails are reduced);
- the correlation between electron and hadron vertex is also improved as shown by the third slide.
Note that the statistics in the plots for 6b.1.1 or 6b2.0 are different because the number of files was not the same.
Based on this results, I would recommend to use the new release for any new calibration or cooking.
The next step will be to test the RF vertex correction again with this new vertex reconstruction.
Best regards,
        Raffaella


> On 24 May 2019, at 19:14, Raffaella De Vita <raffaella.devita at ge.infn.it> wrote:
>
> Dear All,
> Validation of 6b.2.0 has been completed but, as Nick said, we are doing more in depth analysis to quantify the expected improvement in resolution between 6b.2.0 and 6b.1.1. Nick has already launched jobs and I’ll look at them as soon as the files are available. Unless there are problems with farm or disks, I should have the results by Monday.
> Best regards,
>        Raffaella
>
>> On 24 May 2019, at 18:30, Latifa Elouadrhiri <latifa at jlab.org> wrote:
>>
>> Dear Annalise
>>
>> In this case I propose to cook les say 10 Files with each release that we contribute to the validation first then decide on which release to use what do you think?
>>
>> Best regards
>>
>> Latifa
>>
>>
>>
>>> On May 24, 2019, at 12:24 PM, Annalisa D'Angelo <annalisa.dangelo at roma2.infn.it> wrote:
>>>
>>> Dear All,
>>>
>>> I understand that 6b.2.0 includes an improved path length determination that will sensibly improve the TOF resolution with respect to the 6b.1.1 version.
>>> While for high energy particles, the difference in beta determination may not be critical, it would sensibly improve the particle id for low momentum kaons, for example.
>>> If we are talking about few days of delay in the RGK runs cooking and calibration versus a sensibly improved quality, it may be worth waiting.
>>> All the best
>>> Annalisa
>>>
>>> Il 24/05/19 18:16, Latifa Elouadrhiri ha scritto:
>>>> Dear all
>>>>
>>>> 6b.2.0 is not validated yet! Why do we want to use it?
>>>>
>>>> Best regards
>>>>
>>>> Latifa
>>>>
>>>>
>>>>
>>>>> On May 24, 2019, at 11:24 AM, Annalisa D'Angelo <annalisa.dangelo at roma2.infn.it> wrote:
>>>>>
>>>>> Dear Nick, Brandon and Latifa,
>>>>>
>>>>> after today's RGK meeting it has been pointed out that the TOF calibration for low energy particles should be done using at least the 6b.2.0 release.
>>>>>
>>>>> Which decoding version is being used? If we are using the 6b.1.1 release, the TOF calibration is not expected to improve much with respect to the present one.
>>>>>
>>>>> In this case it would be more efficient to wait another week before the complete run cooking...
>>>>>
>>>>> Sorry for the late input...
>>>>>
>>>>> Annalisa
>>>>>
>>>>> Il 22/05/19 16:34, markov ha scritto:
>>>>>> Dear all,
>>>>>> I have started decoding.
>>>>>> Nick.
>>>>>>> On May 22, 2019, at 9:25 AM, Latifa Elouadrhiri <latifa at jlab.org> wrote:
>>>>>>>
>>>>>>> Correct
>>>>>>>
>>>>>>> Sent from my iPhone
>>>>>>>
>>>>>>>> On May 22, 2019, at 9:07 AM, markov <markov at jlab.org> wrote:
>>>>>>>>
>>>>>>>> Dear all,
>>>>>>>> I will start decoding soon.
>>>>>>>> As far as I understand, you want hipo4 for decoding/reconstruction, is it correct?
>>>>>>>> Thank you, Nick.
>>>>>>>>> On May 22, 2019, at 8:15 AM, Latifa Elouadrhiri <latifa at jlab.org> wrote:
>>>>>>>>>
>>>>>>>>> Dear Nick and Brandon,
>>>>>>>>>
>>>>>>>>> This cooking has the priority after RGA run 5038 and 5036 data processing for different calibrations and has the highest priority over any other cooking.
>>>>>>>>>
>>>>>>>>> Best regards,
>>>>>>>>>
>>>>>>>>> Latifa
>>>>>>>>>
>>>>>>>>>> On 5/22/19 8:12 AM, Annalisa D'Angelo wrote:
>>>>>>>>>> Dear Brandon and Nick,
>>>>>>>>>>
>>>>>>>>>> following a telephone meeting with Latifa, it has been mentioned the necessity to identify reference runs to be cooked with the latest release for calibration purposes.
>>>>>>>>>>
>>>>>>>>>> I would suggest to use the files:
>>>>>>>>>>
>>>>>>>>>> 5700     @ 7.5 GeV
>>>>>>>>>>
>>>>>>>>>> 5893     @ 6.5 GeV
>>>>>>>>>>
>>>>>>>>>> The first has been used in the past for the same purpose and it would be nice to use it for comparison.
>>>>>>>>>>
>>>>>>>>>> The latter is a standard good file at 6.5 GeV.
>>>>>>>>>>
>>>>>>>>>> All the best
>>>>>>>>>>
>>>>>>>>>> Annalisa
>>>>>>>>>>
>>>>> --
>>>>> ================================================
>>>>> Prof. Annalisa D'Angelo
>>>>> Dip. Fisica, Universita' di Roma "Tor Vergata"
>>>>> INFN Sezione di Roma Tor Vergata, Rome Italy
>>>>> email:annalisa.dangelo at roma2.infn.it
>>>>> Jefferson Laboratory, Newport News, VA USA
>>>>> Email: annalisa at jlab.org
>>>>> Tel: + 39 06 72594562
>>>>>
>>>>>
>>> --
>>> ================================================
>>> Prof. Annalisa D'Angelo
>>> Dip. Fisica, Universita' di Roma "Tor Vergata"
>>> INFN Sezione di Roma Tor Vergata, Rome Italy
>>> email:annalisa.dangelo at roma2.infn.it
>>> Jefferson Laboratory, Newport News, VA USA
>>> Email: annalisa at jlab.org
>>> Tel: + 39 06 72594562
>>>
>>>
>>
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