[Eg6_analysis] The momentum distributions

[hattawy at ipno.in2p3.fr]

Hello all,
   Here you can find attached file for the results of the distributions,
For both the elastic events and good track events as well.

Best regards,
Mohammad.



> Dear Mohammed,
>
> These are interesting results.  And as Stepan mentioned, the
> difference between the new and old momentum as a function of
> the track's z and phi would be very interesting to see.  It
> might also be interesting to remove the elastic requirement
> and see how a larger kinematic range is affected (and get you
> a lot of quick statistics), although it is of course important
> to see the elastics separately too.
>
> Regards,
> Nathan
>
>
>
> On Mon, 14 Jan 2013 08:38:53 -0600, <hattawy at ipno.in2p3.fr> wrote:
>
>> 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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