[Clas12_verystrange] phi difference

[Shankar Adhikari]

Hi Eugene,

I use more data to plot the same distribution what I had yesterday. Here I
am attaching all the plots. You can see the generated events distribution
for all the particles along with what I had yesterday. Pion has the same
phi difference as like proton.
Seems like low momentum pions energy loss. Could you please comment on this.
Thank you

wiki link: https://clasweb.jlab.org/wiki/index.php/07/12/17

Sincere
Shankar

On Thu, Jul 13, 2017 at 12:31 PM, Shankar Adhikari <sadhi003 at fiu.edu> wrote:

> Hi Eugene,
>
> I use more data to plot the same distribution what I had yesterday. Here I
> am attaching all the plots. You can see the generated events distribution
> for all the particles along with what I had yesterday. Pion has the same
> phi difference as like proton.
> Seems like low momentum pions energy loss. Could you please comment on
> this.
> Thank you
>
> Sincere
> Shankar
>
> On Thu, Jul 13, 2017 at 12:13 PM, Eugene Pasyuk <pasyuk at jlab.org> wrote:
>
>> Hi all,
>>
>> Here is a follow up to yesterday discussion about phi difference for
>> protons. I brought it up at today's software meeting. Our guess was
>> correct. Current version of tracking does not account for energy losses
>> between the vertex and the first tracking layer. Veronique has some ideas
>> how to implement this. Inclusion of the forward micromegas into the forward
>> tracking should help with this as well since it is much closer to the
>> vertex than R1 drift chambers.
>>
>> -Eugene
>>
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>>
>>
>
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