GMn/nTPE analysis meeting 2023 05 05

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Agenda: topics of discussion:

• Broader analysis roadmap/direction - Zeke has a starting point Diagram
• Systematics & Statistics: Sources of systematics:
  • detector efficiencies (most notably HCal)
  • inelastic events subtraction;
  • kinematics - compare average effective Q2 for SBS8 and SBS9 (specific to nTPE);
• What are necessary milestones for a preliminary result List of steps/milestones towards analysis

Minutes:

• Analysis roadmap needs to include the evaluation of systematic uncertainties;
  • side question on radiative corrections: Evaluating their effect requires the comparison of an analysis on Monte Carlo with radiative corrections and without radiative corrections.
• Systematics: Will complete the list of systematics uncertainties.
  • Side discussion on HCal selection: need to evaluate systematics due to the selection of the highest energy cluster for the nucleon candidate;
• Milestones for preliminary results need to be completed and expended.
  • I will contact people to obtain an assessment on the calibration of the different subsystems for the next 2-3 meetings;
• Question on the attempt to analyze p(\gamma pi^+)pi N from SBS9 (brought by Anu):
  • we have to assume E(\gamma) = E(beam);
  • ideally we want only a neutron: will tBB resolution allow us to resolve n from pi N?
• Question on the relevance of getting dedicated p(\gamma pi^+)pi N data for GEn-RP: would need investigation.