General Meson SF Meeting Summary 10/28/21

PARTICIPANTS: Garth, Patrick, Richard, Rolf, Stephen, Tanja, David R., John A.,

EIC IMPACT STUDIES (Patrick)

• Phase space: large x/Q2 and small x/Q2 regions

• Statistical and systematic uncertainties

• Method 1

• assume 1.2% systematic uncertainty - dominant
• Number of events from simulation projections

• Method 2:

• assume 1.2% systematic uncertainty - dominant
• Number of events from calculation

• See strange behavior in the PDFs

• Cross section vs. kinematics. As xL gets large see large variations in fits since not number of events is small --> xL too close to 1 then data cannot be described well

• Action:

• Reperform fits with cut on xL
• If needed can implement cut in generator - however, in data have resolutions so can reach xpi>1, but don't have that in model, so cut should really come from model

FAR FORWARD DETECTORS OCCUPANCIES (Richard)

• IP6 with four different energies and compare to Yellow Report studies

• Hole in right spot?

• Neutrons seem to move

• Actions:

• major issues need to be resolved
• backup plan: use optics
• need G4 to determine real detection fractions
• npi0 (neutrals) could perhaps do with ZDC and no B0 and nothing else - but cannot do charged kaon decay
• prepare occupancy plots without B0 - use processed events with corrected energies (5 on 41)
• focus on pions

NEXT MEETING: THURSDAY NOVEMBER 5 AT 1PM ET