S2: Milestones for the second funding period

  • Measurement of linearly-polarized proton Compton scattering below the pion-production threshold, and the subsequent independent extraction of the proton's scalar polarizabilities based on LEX and chiral PT.
  • Measurement of doubly-polarized proton Compton scattering at lower energies using the new active polarized proton target.  Subsequent determination of the proton  spin polarizabilities based on dispersion analysis and chiral PT.
  • Commissioning and calibration of the active polarized proton target.
  • Precise measurement of deuteron electrodisintegration at low momentum transfer with the aim to evaluate the deuteron polarizability corrections in muonic deuterium.
  • Development of chiral effective field theory for the description of deuteron polarizabilities. Calculation of nucleon and nuclear structure effects in muonic atoms.
  • Completed analysis of the VCS structure functions at Q2 = 0.1, 0.2, 0.5 GeV2 and the extraction of corresponding generalized polarizabilities.
  • Theoretical description of the time-like nucleon structure in the process of dilepton photoproduction (together with Project S1).
  • Simulations and test measurements of dilepton photoproduction off hydrogen.
  • Feasibility studies for possible Compton scattering experiments at MESA.
  • Chiral PT calculation of the proton structure effects in the hyperfine splitting of μH.