GEn Analysis Meeting July 11 2024 10AM EST

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Agenda

  1. Analysis Update - Hunter Presley [1]

Attendance

Kate, Hunter, Andrew, Arun, Faraz, Jack, Jimmy, Saru, Silviu, Vladimir, Jacob, Gary, Braian, Rachel, Todd

Minutes

Hunter's talk:

  • coincidence peak looks asymmetric in time, why?
    • should this tail be included in the cut?
  • using a gaussian fit on the dx plot
  • calculating raw asymmetry run by run
  • waiting to account for pions until GRINCH is included
  • using target measurements to account for nitrogen
    • need a method for estimating how many nitrogen events survive cuts
    • not the same as the number of nitrogen events from the cell
  • roughly how many events used to calculate accidental correction? (need to check code)
  • don't include the tails in coin peak in accidental anti-cut
    • double check asymmetry value (percent or decimal?) - should be just a decimal, table on slide 17 is correct
  • does the accidental background under the coin peak include other forms of background?
    • maybe not, but in general we should be conscious of double counting
    • prompt random subtraction on dx to get rid of background directly? - Gary
      • "You take the dx shape associated with the accidnetals and direclty subtract that histogram from the dx shape associated with your signal peak. Numerically its the same as getting the two fractions and subtracting, but it has a benefit of allowing you to then fit any "residual-non-accidental-inelastic " directly with a shape from data or MC"
  • for inelastic correction, there's no need to include a dx cut in measuring the asymmetry
    • could do an anti-dy cut with no dx cut for more statistics
    • "the distribution of different kinematic events is not symmetric with dy. We should be careful to use large dy(negative W2) to avoid mixing superelastic and inelastic scattering events" - Gary
  • pion correction is just a placeholder for now
  • run summation of physical asymmetries - weight each run by statistical uncertainty (formula at end)
  • no clear systematic trend for dx cut in sensitivity study

Meeting link information

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

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