ExclusiveDiffractionTagging

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EPIC Exclusive, Diffraction and Tagging Working Group

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Conveners:

• Spencer Klein (srklein@lbl.gov‎)
• Rachel Montgomery (Rachel.Montgomery@glasgow.ac.uk)
• Axel Schmidt (axelschmidt@gwu.edu)
• Daria Sokhan (daria@jlab.org)
• Please e-mail us with any questions (or use phys-exclusive-diffractive mattermost channel)

Meetings:

• INDICO page with all past and upcoming meeting links
• Currently every second Monday @ noon US Eastern time zone. Frequency can be changed upon demand/request.
• Next meeting 26/9/22

Email-list subscription:

• HERE
• Sign up at above link, since all announcements will be made to that list.

Simulations:

• Google sheet with locations of output files from July simulation campaign: HERE
• Further instructions on accessing and analysing the July sim files: https://indico.bnl.gov/event/17070/contributions/68171/attachments/43275/72797/Meeting120922.pdf

On-going Activities/Task List (DRAFT - in discussion and below is currently example/starting point only for discussions, please provide input on your channels):

• General Ideas for approach to Oct Sim campaign (DISCUSS and collect input)
  • DVCS and DVMP pi0 - make sure we can separate them. 
  • Incoherent DVCS on deuteron - recoil and spectator detection. (possibly doesn't have to be priority if no one available to analyse)
  • Pion FF's
  • VM production: several channels available, pick most experimentally challenging one(s) in ep and eA? This is area where new people could get involved since there are several channels
  • Backward production places other challenges on detectors? u-channel DVMP and backwards DVCS?
  • TCS or something else for photoproduction.

General on-going activities in general below (discuss and alert if incorrect):

• DVCS
  • Detector performance check:
  • Generator:
  • Active personnel: S. Fazio, I. Korover, G. Penman...
  • To-do for Oct:
  • Open task: (for eHe: pi0 background generator for eA and incoherence background for eA - looks like possibly beagle could be good)

• TCS
  • Detector performance check:
  • Generator: Epic
  • Active personnel: D. Sokhan, K. Gates...
  • To-do for Oct:
  • Open task: Background sim

• DVMP
  • Detector performance check:
  • Generator:
  • Active personnel: J. Frantz; P. Steinberg; S. Klein; Z. Tu; N. Santiesteban; Y. Ji; S. Fegan
  • To-do for Oct: There are many vector mesons, and there are channels that are as-yet unexplored, such as forward omega photoproduction and the psi'. We could also use someone to look at the acceptance for the scattered electron. For eA going to pursue phi and j/psi.
  • Open task: see above

• DVMP for Pi/K FormFactor
  • Detector performance check: need B0 fully implemented for full study of res and acceptance
  • Generator:
  • Active personnel: S. Kay; G. Huber
  • To-do for Oct: updating EG (include K, lower Q2 for pi, and diff beam energies)
  • Open task: mods for EG compatibility with dd4hep; neutral decays from lambda in g4

• Pi/K SF
  • Detector
  • Generator:
  • Active personnel: R. Trotta
  • To-do for Oct:
  • Open task:

• Backwards channels
  • Detector performance check:
  • Generator:
  • Active personnel: Z. Sweger; S. Klein; Bill Li
  • To-do for Oct: There are many vector mesons, and there are channels that are as-yet unexplored, such as forward omega photoproduction and the psi'. We could also use someone to look at the acceptance for the scattered electron.
  • Open task: see above

• XYZ spectroscopy
  • Detector performance check:
  • Generator: el Spectro
  • Active personnel: D. Glazier...
  • To-do for Oct:
  • Open task: General background events for low Q2 events

• Detector studies for WG
  • Luminosity detector study: D. Gangadharan
  • Lambda in target fragmentation: Y. Furletova (open task: minimum bias sample for background study)