[Hps-ecal] ECal Meeting

[Stepan Stepanyan]

Hello Luca,

Thanks for the work and the note. Sorry, meeting was cut short so I 
could not
ask my questions. So, here they are (I read not and will comment on it) -
- I am confused with your definition of \delat E and ECal resolution. In 
the proposal
we quoted sigma/E=4.5%/sqrt(E) for ECal resolution. This means that the 
sigma will
be sigma=4.5%*sqrt(E). This will end up for 1.5 GeV energy sigma ~ 4.9 
MeV, for
2.2 GeV sigma~5.9, and for 6.6 GeV it is ~10 MeV. So, I am not sure 
where this 30 MeV,
20 MeV, and 6 MeV come from, and what they represent.

- From your slides, Eq.(8) in the note is for 2.2 GeV and Eq.(9) is for 
6.6 GeV. Please
mention that i the note

- on page 3, you have L=34, which I assume is the with for 23 modules 
and it includes
thickness of wrapping, while H=6.5 cm, that is calculated without taking 
into account
vertical space between modules. It may not matter, but will be better to 
be consistent.
I do not understand what is h=4 cm, if it is distance from the x-z plane 
to the bottom
of the face of the ecal crystals it should be 2 cm, since the gap 
between two ecal modules
is 4 cm.

- Table 2 and Fig. 3, this fiducial acceptances, they do not take into 
account magnetic field,
is not it.

I am attaching the note that we wrote with Takashi, will be interesting 
to compare your numbers
with numbers in the note, it seems your cross sections are much higher.

Regards, Stepan

On 3/24/14 1:07 PM, Luca Colaneri wrote:
> Il 24/03/2014 17:47, Raphaël Dupré ha scritto:
>> Hello,
>>
>> I think we passed the maximum length of meeting due to the time change.
>> So we will have to continue the discussion next week.
>>
>> Luca, could you send your slides around so everybody sees your results
>> and conclusion?
>>
>> Sorry for the problem, next week Europe will be back on the usual
>> schedule and this issue should not bother us again.
>>
>> Best,
>>
> Ok, no problem.
> I wrote a report on what I did, you'll find it in the attachment along 
> with the slides.
> If you have any question, please write me.
>
>
> my bests
>
> L.
>
>
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