JEF meeting, October 15, 2021

From GlueXWiki
Jump to: navigation, search

Meeting time and location= 9:30 am EST (JLab time) Bluejeans only


Connection instructions

We are using BlueJeans Video/Audio conferencing. Our meeting ID number is 992533564. Click "Expand" for more details.

  • Make sure you have created a BlueJeans account via your JLab CUE account using this link:
  • If connecting via Web Browser: click this link (no passcode is needed):
  • If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
  • If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above

Agenda

Minutes

Attendees: Igal, Bill, Igor, Olga, Chase, Varun, Zisis, Jon, Azizah, Susan, Liping, Phil, Tim B., Arshak, Jane, S.T.

  • Chase gave an update on his work using TMVA to background suppression for the η→π0γγ channel
    • Compared Boosted Decision Trees (BDT) to Fisher discriminants
      • BDT method works better
    • Issue: possible over-training: adjusted several parameters to mitigate
    • Looked at different combinations of input variables (e.g. elasticity, transverse momentum,...)
    • Defined figure-of-merit, found optimal BDT cut value --> produces a nice peak at the η mass for simulated events!
  • Simon gave a brief update on his work on a generator to simulate π0π0 background