Measurement of GEp/GMp in ep -> ep to Q2 = 5.6 GeV2

Abstract

The ratio of the electric and magnetic form factors of the proton, GEp/GMp, was measured at the Thomas Jefferson National Accelerator Facility (JLab) using the recoil polarization technique. The ratio of the form factors is directly proportional to the ratio of the transverse to longitudinal components of the polarization of the recoil proton in the elastic $\vec{e}p\to e\vec{p}$ reaction. The new data presented in this article span the range 3.5 < Q2 < 5.6 GeV2 and are well described by a linear Q2 fit. Also, the ratio QF2p/F1p reaches a constant value above Q2=2 GeV2.

6 pages, 4 figures Added two names to the main author list

References in corpus (9)

• The ratio of proton's electric to magnetic form factors measured by polarization transfer
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• Electroweak form factors of baryons in dense nuclear matter
• Extraction of proton form factors in the timelike region from single-polarized e+ e- -> \vec p anti-p events
• Reliability Analysis of the Results of the Known Experiments on Measuring of the Sachs Form Factor Ratio Using the Rosenbluth Technique. Polarization of the Final Proton in the $e\vec{p}\to e\vec{p}$ Elastic Process
• Inclusive scattering data on light nuclei as a precision tool for the extraction of G_M^n
• $\Delta$ contribution in $e^{+}+e^{-}\to p+\bar{p}$ at small $s$
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Two Photon Exchange Contributions to Elastic ep Scattering in the Nonlocal Field Formalism
• Proton and neutron form factors with quark orbital excitations
• Sea contribution to the charge radii and quadrupole moment of $J^P={\frac{1}{2}}^{+},{\frac{3}{2}}^{+}$ baryons
• Impact of new particles on the ratio of Electromagnetic form factors
• Precise method for the determination of the neutron electric form factor based on a relativistic analysis of the process $d(e,e'n)p
• Physics at an Upgraded Fermilab Proton Driver
• Hadron Structure from Lattice QCD
• What the lattice can tell us about nucleon structure
• Overview of nucleon structure studies
• Angular Dependence of the Polarization Transfer to the Proton in the $e\vec{p}\to e\vec{p}$ Process
• Nucleon Form Factors in a Light-Cone Quark Model with Two-Photon Exchange
• Recent Experimental Results from JLab
• Ratio of the proton electromagnetic form factors from meson dressing
• Two-Photon Effects in Lepton-AntiLepton Pair Photoproduction from a Nucleon Target using Real Photons
• The Nucleon Elastic Form Factors
• Investigation of the internal structure of the deuteron against the background of two-photon exchange effects in elastic electron-deuteron scattering
• A measurement of two-photon exchange in Super-Rosenbluth separations with positron beams
• Magnetic moment operator of non-Dirac particles and some elements of polarization $ep$-experiments
• Logarithmic corrections and soft photon phenomenology in the multipole model of the nucleon form factors
• Electromagnetic proton form factors in dual large-$N_c$ QCD: an update
• Exact Relations for Two-Photon-Exchange Effect in Elastic $ep$ Scattering by Dispersion Relation and Hadronic Model
• Flavor content of nucleon form factors in the space- and time-like region
• Super-Rosenbluth Measurements with Electrons and Positrons
• Two Photon Exchange Contributions to Elastic e + p --> e + p Process in a Nonlocal Field Formalism
• On the physics behind the form factor ratio ${\mu }_p{G}_E^p(Q^2)/G_M^p(Q^2)$
• Images of the Origin of Mass
• Manifestation of the JLab proton polarization data on the behaviour of strange nucleon form factors
• QED radiative corrections for elastic e(mu)p scattering in hadronic variables
• Prediction of neutron electromagnetic form factors behaviors just by the proton electromagnetic form factors data
• Tortuous ways to the extraction of neutron observables from inclusive lepton scattering
• Light-cone sum rule approach for Baryon form factors
• On the electromagnetic form factors of the proton from generalized Skyrme models
• Nucleon axial-vector form factor and radius from future neutrino experiments
• Unpolarized nucleon structure studies utilizing polarized electromagnetic probes
• Some comments on the handbag approach to wide-angle exclusive scattering
• Theory of QED radiative corrections to neutrino scattering at accelerator energies