GEn Analysis Meeting February 27 2025 2PM EST

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Agenda

1. A_LL Pass 0 replay - Gary

1. GEn Inelastic Background Contributions - Jacob

Minutes

Gary:

• replays happened for A_LL runs but need to be redone
• calibrate later
• SBS GEMs on and physics master 1
• data available on volatile
• approx 350M events total according to run list

Jacob:

• W cut on kin4? What masses to consider? 1.43GeV is critical
• this is all done using only BB side, should now consider SBS side
• fraction: (# events for a process) / (total # events pass cut)
• should Gordon reach out to Bosted? probably?
• value M refers to specific resonance
• events are cross section weighted
• what fraction is elastic? further step
  • add M = mass of proton
  • can take fermi motion into account later
• next step should be to include a dy anti cut and compare inelastic contributions
• results from papers do NOT include fermi motion (free neutron and free proton)

From Jacob - How I computed the fraction is by:

1. Start with a standard set of kinematic variables that come from simulation
2. Compute cross section from this standard list
3. Construct a histogram for one of the kinematic variables, and weight it by the cross section
4. Sum up all of the bins from this histogram for a particle cross section, call sum_i
5. Sum up all of the sums for a given process (this will be the total number of bins for the whole cross-section), call it sum_tot
6. Divide each individual summed histogram by the total sum and that is your fraction (sum_i/sum_tot)=f_i where f_i is the fraction I put in the table

Meeting link information

See email invitation, or contact Arun Tadepalli for Zoom link.