Tasks Needed to investigate
Dilution factor using MC to calculate using assumed cross sections (Also make run plan to reproduce MC effort (single or dimuon))
Also
need to know:
What is the statistical reduction by reducing target size (error bar projection)
What is the statistical reduction by reducing beam intensity to magnet maximum (error bar projection)
Systematics due to polarized target, microwave, dynamic dilution factor,
Beam Heating Polarization Effects, Uneven decays in Polarization
List of contributing systematics
Ameasure =fPAphysics
dilution factor f = σpolarized Nucleon /ΣσNonpolarized Nucleon
In order to explore the physics of interest we must try to mitigate know errors and measure what uncertainties we can.
Should try to stay below over all systematic contribution of what limit in the asymmetry?
Detector Contributions:
Acceptance: Look at previous data using SeaQuest and check for false asymmetries also use Monte Carlo to study phi-modulation
MC study needed for detector acceptance corrections
Fiducial Limits: Study detector limitations and necessary cuts
...
Change in instrumental noise: Prop tube, chambers, etc...
Event Selection:
PID, IM Cuts
target events:-250<Z<50cm
Beam dump events: -50<Z<200cm
Tracking Quality Cuts
Beamline Uncertainty:
Luminosity: Variation in luminosity not accounted for
...
Scrapping: Left-right asymmetries induced by beam scrapping
DeadtimeDead-time: Need accurate accounting for deadtime dead-time and efficient monitoring of detectors in this accounting
Some general issues: Large beam x-y profile, narrow target size, beam position drifts (dx~1-2mm), non-uniform DC response to large beam intensity fluctuations
MC study needed to correct target/beam dump acceptance difference
MC Trigger road bias and efficiency studies
Systematic flips: Fmag, kMag, polarization check inpact of relative beam on target beam luminosity
Maybe use events from beam dump to normalized the detector acceptance effects
Target Systematics: (Can be different for proton and deuteron)
Know Uncertainty in polarized target: TE, Temp/pressure measurements, baseline, mag field drifts, charge averaging, NMR tune drifts, area measurements see Errors in Polarized Targets
Dilution Factor: Must be measured and calculated
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Beam Heating Polarization Effects: Secondaries scatterng scattering off the down stream end might heat things up to lower the polarizatonpolarization
Uneven decays in Polarization: The target receives a different dose over its length
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