Nov2012
Friday, November 16
Agenda -
- Trial forum site: https://ampweb.jlab.org
- Tutorial on AmpsTools (R.Mitchell)
JLAB-PWA Meeting
MINUTES
11/16/12
-Sorry that we have some problems using EVO. We ended using ReadyTalk, perhaps working better? I will send you before next meeting new information on how to remotely connect.
-Ryan Mitchell gave us a tutorial on how to use AmpsTools based in the Dalitz example.
version 0.5 was updated few hours before the meeting and it is the version preferred (you can get the software from
http://sourceforge.net/projects/amptools/
and see wiki on how to install: https://wiki.jlab.org/pwawiki/index.php/Main_Page
Due to a late start (EVO problems) Ryan will need to continue the tutorial next meeting (11/30/12). (thank you Ryan!) Prepare more of your question and exercise on the Dalitz example for next time!
-Carlos
Friday, November 2
Agenda -
Baryon contamination on PWA.
Minutes
==
11/2/2012
Present at JLab: Dennis W., Mike P., Yi Q., Mark I., Carlos S.
by Phone: at GWU: Diane S. and Ron W.
We continue our discussions on Baryon Contamination:
Last meeting we decided to compare different methods of attacking the problem.
Today we focussed on expanding our PWA model to include baryon amplitudes (derived from fits to the data). We plan the following tasks:
We will use the AmpTools software to include the SAID baryonic amplitudes in an overall (including mesons and baryons) partial wave analysis of the neutral 3-pions systems (pi+pi-pi0) in photoproduction. We will analyze g12 data and also study simulations (for Gluex and CLAS12) to test our model.
-First steps: will be to install at JLab AmpTools (will be nice a tutorial session by Ryan ?). -Get the relevant baryon vertex amplitudes from SAID (hopefully with Ron's help) -Produce our PW model and Likelihood function (we might use GPUs- depending on effects in normalization integrals, i.e. computer times). This exercise will produce a PW generator.
We will, first, use this model to study the angular effects of introducing the baryon amplitudes, for example in kinematic (angular) cuts, moments ...
All attending agree to work in this problem! .... and report progress in two weeks.
-Carlos
