March 13th, 2019

Attended: Moskov and Igor. Jim is in Thailand while Justin has an office hours.

As far as you know, PAC47 will be held during the week of July 29, 2019.

The deadline for submission of proposals and updates is 8:00 a.m. EDT on Monday, June 10, 2019 [1] . The deadline for the GlueX Collaboration submission is May 10, 2019.

Using a BnGa ("Andrey" and "Viktor") exercises, "Mikail" made two plots to show impact of 100 vs. 20 days measurements [2],[3].

Mikhail's comments for polarization plot: With 20 day the fit is badly constrained, especially in polarisation observables (note the data points are for 100 days, I have attached a plot with 20 days polarisation). For couple of points at this W you do not have enough statistics to build Ay and fit it. That is why the fit has a lot of freedom to vary in any directions and it does it - the masses, widths and couplings of resonances moves a lot. For 100 days everything is pretty much settled. Also since it is a global fit, the bad statistics and pure P knowledge at lower energies influence higher W via unconstrained tails of the resonances.