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EIC discussion : just questions. Zhongbo Kang Los Alamos National Laboratory. “So what” questions: from outside “EIC” community. If we have measured collinear unpolarized PDFs up to enough accuracy, so what? Answer from HEP: high precision, chance for BSM physics

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eic discussion just questions

EIC discussion: just questions

Zhongbo Kang

Los Alamos National Laboratory

so what questions from outside eic community
“So what” questions: from outside“EIC” community
  • If we have measured collinear unpolarized PDFs up to enough accuracy, so what?
    • Answer from HEP: high precision, chance for BSM physics
  • If we measure helicity distribution to high accuracy, so what?
    • Answer from EIC community: proton spin
  • If we have measured TMDs, spin asymmetries, small-x UGDs up to 1% accuracy, so what?
  • If we have understood the associated QCD dynamics, e.g., as described by TMD/small-x evolution, so what?
  • What do we learn?
    • Answer from EIC community: confined motion, 3D tomography, gluon saturation, nonlinear QCD dynamics, …
  • These questions have been asked by many people and many times
    • An ANL physicist (nonperturbative QCD) 2012
    • An INT physicist (nuclear astrophysics) 2013
    • A Stony Brook physicist (RHIC HIC hydrodynamics & flow) 2014
central theme
Central theme?
  • Do we have a central theme for EIC?
    • “Understanding the glue that binds us all” (from EIC white paper title). Is this the central theme for our EIC?
    • Do we want to emphasize/sharpen more on this
    • Is it “attractive” enough to outside community?
  • Every machine has a “big” program. However, presenting “one” central theme is a very good/quick way to catch the attention from the broader community
    • LHC: “God” particle (Higgs)
    • RHIC: Quark Gluon Plasma
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