The Form Factors of the Nucleons: Present Status - Fisica

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Dyson-Schwinger Equations Comparison of DSE results with data, extrapolation? proton neutron “Interpreting experiments with GeV electromagnetic probes requires Poincaré covariant treatment of baryons, covariant dressed-quark Faddeev equation, and correlations in Faddeev amplitude; quark orbital angular momentum is essential to that agreement”. C.D. Roberts et al 2/17/2013 C.F. Perdrisat SAEMP Trento 2013 18
Dressed quarks in the Nucleon Dressed quarks are a consequence of dynamical chiral symmetry breaking (DCSB) in QCD. Dressed quarks and antiquarks constituents are described/predicted by Dyson-Schwinger Equations (DSEs). The quarks-partons of QCD acquire a momentum dependent mass that in the infra-red limit is 2 orders of magnitudes larger than the current-quark mass; mostly due to a cloud of gluons surrounding a low-momentum quark. In this approach the Higgs boson does not contribute to the mass of the visible universe! 2/17/2013 C.F. Perdrisat SAEMP Trento 2013 19
Page 1 and 2: The Form Factors of the Nucleons: P
Page 3 and 4: Results for the proton’s G Ep and
Page 5 and 6: One-photon exchange or Born approxi
Page 7 and 8: Rosenbluth Separation Method In ter
Page 9 and 10: All Rosenbluth separation data for
Page 11 and 12: Polarization Transfer Method h beam
Page 13 and 14: Results for the G Ep/G Mp ratios fr
Page 15 and 16: Previous slides illustrate discrepa
Page 17: 2/17/2013 Many theoretical models a
Page 21 and 22: Perturbative QCD (pQCD): Asymptotic
Page 23 and 24: GPDs and Electromagnetic FF The fir
Page 25 and 26: The proton is not spherical? Not a
Page 27 and 28: Quark Flavor separation Assume that
Page 29 and 30: Quark Flavor separation (II) In Rob
Page 31 and 32: Fd 1n Fd 2n Fu , 1p Fu , 2p Proto
Page 33 and 34: Each of the neutron Sachs form fact
Page 35 and 36: More about the Rosenbluth versus do
Page 37 and 38: Radiative correction to the last da
Page 39 and 40: Currently 3 attempts to measure two
Page 41 and 42: Preliminary results from run II, No
Page 43 and 44: Two-photon exchange is next term to
Page 45 and 46: P ℓ / P ℓ Born Kivel and Vander
Page 47 and 48: Mainz JLab Mostly Hydrogen Lamb shi
Page 49 and 50: 1) At Jlab E08-007, data taking com
Page 51 and 52: Conclusions continued • Much has
Page 53: The following collaborators were in

The Form Factors of the Nucleons: Present Status - Fisica

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