General Meson SF Meeting Summary 6/28/21

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PARTICIPANTS: Ali Usman, David Richards, Douglas Higinbotham, Garth Huber, Patrick Barry, Richard Trotta, Tanja Horn, Stephen Kay, Rolf Ent, Tobias Frederico, Thia Keppel


DISCUSSION DETECTOR PLANNING

  • Update from Yulia on coordinate system to use for detector setup (mainly for ATHENA or IP6, ECCE could use different approach, please, check! … ):
  • Right handed system.
  • Z: Electrons goes along Z axis towards negative Z values ( 0,0, -1)
  • Y: point to the sky
  • X: Protons goes as ( -sin(a), 0, cos(a)) , where a- crossing angle , and crossing goes towards negative X.
  • Additional information on IR layout (Rolf)
  • Electron beam inside, ion outside
  • Coordinate system chosen for earlier images, e.g., CDR is different
  • No immediate impact on generators or Geant4 simulations
  • this is about the coordinate system, nothing wrong with analysis!
  • Also ongoing work on IP8 Secondary Focus nucleon momentum fraction (x_L) coverage - optimizing the transverse momentum p_T coverage vs. x_L (similar to what was done in JLEIC) - expect an update at the next IR2 meeting
  • Action item:
  • detector positioning studies with virtual planes


UPDATES MESON SF AND MESON FF

  • Meson SF (Richard, Rachel)
  • ran events through eicsmear/Geant4 (Fun4All), resolving issues with transport - do not see events in any of the FF detector
  • on generator level ongoing work to analyze t distributions
  • Action item:
  • analyze events from Geant4 for IP-6/IP-8
  • update on t-distribution
  • DEMP generator events (Stephen)
  • ran events through eicsmear/Geant4 (Fun4All) and analyzing events detected in the ZDC - looks reasonable
  • Action item: resolve why no events in off-momentum or Roman pot detectors
  • Kaon FF studies (Ali)
  • Use DEMP for kaon generation: KL and KSigma
  • Run generated events through eicsmear/Geant4 simulation - analyzed phase space distribtutions, no weights yet
  • For KL identification - start with neutral decay here - not clear if need off-momentum and RP detectors in that case
  • Action item: investigate why some KL and KSigma plots look different in phase space (no weights applied)


UPDATES ON GLOBAL FITTING, LATTICE, THEORY

  • Ongoing efforts on PDF analysis for TDIS
  • Would like the Q2 bins assumed for the TDIS proposal
  • Lattice efforts ongoing
  • Theory DSE efforts ongoing


NEXT MEETING: MONDAY 12 JULY AT 4PM ET