[Clas12_verystrange] Very Strange Meeting May 2nd

[Derek Glazier]

Hi Mike,


> ** There are a lot more events at large angle and low momentum. I assume
> these events are coming from CTOF, but have not checked that assumption.
This is possibly the new CVT tracking algorithm which seems to be much 
more efficient, while also introducing some extra background.
> The Bad and the Ugly->
>
> * I tried to do a missing mass for the reaction gamma p -> p X. Get huge
> bump at massX squared = - 0.1 . Can't figure out what is going on there.
For FT e- and run 3050 I would expect a large elastic peak at massX=0, 
this is what I get. Could some calibration be off? For run 3050 I use 
6.4GeV beam energy.
>
> * The invariant mass of the proton pi^- system is just a blob at masses
> that look somewhat high. Just a mess really.
>
> If anyone can get any good looking physics (some sort of invariant mass
> peak at about the right location), please let me know. My stuff is just
> kind of awful :(
I attach a slide for eppi+pi- final state. I seem to get missing mass 
peaks at the right place and the 2pi invariant mass looks like a rho. 
The last few updates have certainly improved the cooked data quality. 
Although I do not see any Deltas for some reason.
Cheers
Derek
>
> Take care,
> Michael
>
>> We shall have meeting tomorrow, Wednesday May 2nd at 11:15 JLab time.
>> Those at JLab meet in L210a
>>
>>
>> Meeting Title: Very Strange Meeting
>> Meeting Time: Every Wednesday â?¢ from September 20, 2017 â?¢ 11:15 EDT /
>> 1 hr
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