General Meson SF Meeting Summary 8/2/21
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PARTICIPANTS: Garth Huber, Patrick Barry, Petr Stepanov, Richard Trotta, Stephen Kay, Tobias Fredericko, Tanja Horn, Rolf Ent, Ali Usman
MESON FORM FACTOR (Stephen, Ali)
- Evaluation of data from pass-through simulation for ECCE
- kinematics quantities included in analysis
- need beam information
- Scattered electron
- covers both electron endcap and barrel
- most events in electron endcap ~130 deg and above
- raidative tail beyond 135 deg
- Strong correlation in pi+ and electron truth vs track, px vs py comparison
- some correlation expected (solenoid field)
- Action items:
- implement smearing and additional studies
- explore pass-through Athena simulation framework
MESON STRUCTURE FUNCTION (Richard)
- Plan for meson SF validation studies
- produce the first benchmarks with EicRoot(Alex)/Fun4All(Richard) with a single beam energy and reasonable event sub-sample (something which can run fairly quickly, probably < 100k events).
- repeat the process with DD4HEP
- decide on a path forward for a larger sample, and look at perhaps the lowest and highest beam energies back to back to see how the detector subsystem acceptance/overlap regions change with energy (e.g. in e+p DVCS the B0 is the most-important at low energy, the Roman Pots at high energy - it's good to know which detectors are needed for which energy/physics channel).
DETECTOR PLANNING FOR PROPOSALS
- Discussion of possible processes that really benefit from second IR, high-x, low-t
- For pion form factor: pi0/proton for experimental background studies and model constraints
- For kaon SF studies: L/S0 ratios
LATTICE/GLOBAL ANALYSIS (Patrick)
- EIC impact study - variation of splitting function regulator
- seems to have large impact on valence and gluon
- high/low limit to indicate theoretical uncertainty
- Ongoing: Exploring impact of TDIS JLab data on valence/gluon distribution
THEORY (Tobias)
- Work on PDFs ongoing
NEXT MEETING: MONDAY 23 AUGUST AT 4PM ET