[Clas12_verystrange] phi difference

[Eugene Pasyuk]

Shankar, 

As we discussed yesterday, could you add distributions of ALL generated particles, not only those which were reconstructed. This way we will see what we lose. Also make 2d plots delta phi vs. momentum. 

-Eugene 

> From: "Shankar Adhikari" <sadhi003 at fiu.edu>
> To: "clas12 verystrange" <clas12_verystrange at jlab.org>
> Sent: Thursday, July 13, 2017 12:54:33 PM
> Subject: Re: [Clas12_verystrange] phi difference

> 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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