[d2n-analysis-talk] d2n analysis meeting on July 5 is CANCELLED, next meeting will be July 12

[Brad Sawatzky]

Hi all,

We decided to cancel the July 5th meeting, so our next meeting will be
on July 12 at the usual time.

I'm hoping that Vahe/Gregg may be able to attend the June 12 meeting and
give us a status report on the simulation work.  A couple of the top
priorities for near-term analysis need some simulation studies:
- Understanding pair-symmetric backgrounds
  - simulation will let us understand the bend-up vs. bend-down
    differences (ie. is it all "geometry")
  - generate plots and show data vs. simulation to see if the
    trends match
    - bend-down e+ : bend-up e+    vs. x (or momentum, etc)
    - bend-up   e+ : bend-up e-    vs. x (or momentum, etc)

- Investigate trackless events
  - only ~15% of our T2 triggers have a track --- why?
  - Kalyan comments that Transversity analysis thinks that the bulk of
    the trackless events are really pi0 decays
    - details are in a long-note and/or Transversity ELOG entries by
      Xin/Kalyan
    - suggestion was made that these trackless events could be a
      handle on pi0-decay related charged backgrounds(??)
      - ie. use these trackless "pi0" events to calibrate pi0 yields
        in simulation
        - simulation then helps tell us what fraction of those total
          pi0 yields show up as e+:e- backgrounds -- seems possible,
          but probably difficult...



-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov