[Eg6_analysis] The momentum distributions

[hattawy at ipno.in2p3.fr]

Hi Stepan,
   In Fact, due to the small number of events, we could not find big
differences. With the current number of elastic events, both of the
packages have showen almost the same distributions of delta_z and
delta_phi, but not exactly the same. Here i attached the plots of
delta_z for both setup parameters, you can have a look through them.
Now i am cooking data with size 20 times the data i started with, keep
in touch with the new results as soon as possible.

Ragards,
Mohammad.


> Hello Mohammad,
>
> Thanks for this nice analysis. Did you tried to see if there
> is any Z-vertex or \Phi dependence to the momentum
> difference.
>
> Regards, Stepan
>
> On 1/14/13 5:46 AM, hattawy at ipno.in2p3.fr wrote:
>> Dear all,
>>     For the comparison between the momentum distributions between the
>> old
>> setup parameters of delta_phi and the new ones i have extracted, we
>> have ~97 of the elastic events in the new setup which are common with
>> the old setup and we have ~1% differnce in the number of the elastic
>> events between the two setup ( 359 elastic events in the old data, 351
>> elastic events in the new one and 340 events common). For the momentum
>> differene distribution, you can have a look at the attached file, in
>> which
>> delta_p = new momentum - old momentum, just for the common elastic
>> events.
>> It is mainly a peak centered aroud zero, but there is a tail in the
>> positive side, in which the momentum constructed with the new parameters
>> is higher than the old one. I could not conclude anything with this
>> number
>> of elastic events from the distributions of dedx vs. p.
>> In conclusion, we can go to the next cooking with the current
>> parameters.
>>
>> Best regards,
>> Mohammad Hattawy.
>>
>>
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