MOLLER Pion Background Meeting Thursday, September 15, 2016 3:00pm EST

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Previous Meeting: Thursday,_August_18,_2016_3:00pm_EST

Meeting Information

BlueJeans Call Information


Phone Number: 1-800-240-2560

Meeting ID: 624029893


  • New mailing list! Make sure to subscribe.
  • Dominic: Comparing Wiser generator to modified Hall D generator.
  • Scott: Implementation of lead wall and strawman pion detector.
  • Jacob: Starting to work on pion simulations.
  • KK/Mark Request: Conceptual Design needed by early December for directors review.
  • Any new business?


Attendees: Kurtis, David, Rakitha, Yuxiang, Seamus, Wouter

Not Attending: KK(teaching conflict), Mark P.(prior commitment, but will normally be able to attend.)

Scribe: Kurtis

  • Manpower: Scott will be working only a few hours a week for this upcoming semester. Jacob McCormick will be doing his senior research this semester so he will be working close to 10-15 hours a week.
  • Recap of summer work: Dominic had been comparing Hall D Lund model with the older Wiser code over our kinematic range. The conclusion was that they have similar predictions. For development of the pion detector the Wiser code could be used for now. Later physics analysis this might have to be re-investigated. David will post Domninic's final report to the MOLLER docDB for reference.
  • Pion Detector wish list:
    • Does it need to be used in integrating mode and tracking mode?
    • Does the detector system need to cover the entire phi range?
      • David: Possible worry about parity-conserving asymmetry from pions, could be very large(Need someone to look into these. Look for previous work on the subject.)?
      • David: Will probably have to be measured in all septants.
      • Yuxiang: Previously assumed azimuthally-symmetric rates/asymmetries for pions.
      • David: Could
    • What type of ring coverage do we need?
      • Yuxiang: Original background analysis assumed measuring pion asymmetry in all septants.
      • Yuxiang: Depends on which type of global or local analysis. Local analysis would only require pion detector behind main moller ring.
      • Yuxiang: Global analysis needs pion detectors for all rings.
      • David: Could become costly if we need full coverage of all septants. Especially, the lead wall thickness.
  • Contact Paul regarding these possibly large parity-conserving asymmetries.
  • Inclusive pion asymmetry from transversity, is it a huge asymmetry that should a worry for us(regarding parity-conserving asymmetries)?
  • Wouter: These are large asymmetries that wouldn't require lengthy studies to get a decent precision measurement. But they definitely have to be studied.