[Eg6_analysis] The momentum distributions

[Stepan Stepanyan]

Hello Mohammed,

Nice, now I can see that the large momentum differences, delta_P,
are at the ends of the target. So, it looks to me that the old and new
constants work the same way at the middle of the target while they
are diverge at the ends. We may consider using the new ones if
they are the correct ones. I do not know how to check this.

Regards, Stepan

On 1/14/13 2:14 PM, hattawy at ipno.in2p3.fr wrote:
> 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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