Measurements of electron-proton elastic cross sections for $0.4<Q^2<5.5(GeV/c{)}^2$

Abstract

We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 unique kinematic settings covering a range in momentum transfer of 0.4 $<$ $Q^2$ $<$ 5.5 $(GeV/c{)}^2$. These measurements represent a significant contribution to the world's cross section data set in the $Q^2$ range where a large discrepancy currently exists between the ratio of electric to magnetic proton form factors extracted from previous cross section measurements and that recently measured via polarization transfer in Hall A at Jefferson Lab.

17 pages, 18 figures; text added, some figures replaced

References in corpus (7)

• Measurement of GEp/GMp in ep -> ep to Q2 = 5.6 GeV2
• Two-photon exchange and elastic electron-proton scattering
• How to reconcile the Rosenbluth and the polarization transfer method in the measurement of the proton form factors
• How well do we know the electromagnetic form factors of the proton?
• Implications of the discrepancy between proton form factor measurements
• New empirical fits to the proton electromagnetic form factors
• A Study of the Quasi-elastic (e,e'p) Reaction on ${}^{12}$C, ${}^{56}$Fe and ${}^{97}$Au

Cited by in corpus (136)

• Nucleon Electromagnetic Form Factors
• Proton elastic form factor ratios to $Q^2$ = 3.5 GeV${}^2$ by polarization transfer
• The electric and magnetic form factors of the proton
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Precision Rosenbluth measurement of the proton elastic form factors
• Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q^2 = 8.5 GeV^2
• Partonic calculation of the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer
• Two-photon exchange in elastic electron-nucleon scattering
• Determination of the pion charge form factor for Q^2=0.60-1.60 GeV^2
• The two-photon exchange contribution to elastic electron-nucleon scattering at large momentum transfer
• Nucleon Form Factors in QCD
• Review of two-photon exchange in electron scattering
• Final Analysis of Proton Form Factor Ratio Data at ${\mathbf{Q}}^2=4.0$, 4.8 and 5.6 GeV${}^2$
• Extraction of the proton radius from electron-proton scattering data
• Two-Photon Physics in Hadronic Processes
• Proton and neutron electromagnetic form factors and uncertainties
• An interacting quark-diquark model of baryons
• The proton charge radius
• Charged pion form factor between $Q^2$=0.60 and 2.45 GeV${}^2$. I. Measurements of the cross section for the ${}^1$H($e,e^{\prime }{\pi }^{+}$)$n$ reaction
• Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)
• Two-photon exchange in elastic electron-proton scattering
• Towards a resolution of the proton form factor problem: new electron and positron scattering data
• Search for effects beyond the Born approximation in polarization transfer observables in $\vec{e}p$ elastic scattering
• Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering: Determined by the OLYMPUS Experiment
• Polarization Transfer Observables in Elastic Electron Proton Scattering at $Q^2=$2.5, 5.2, 6.8, and 8.5 GeV${}^2$
• Proton G_E/G_M from beam-target asymmetry
• Electromagnetic form factors of the nucleon: new fit and analysis of uncertainties
• A pure S-wave covariant model for the nucleon
• Extraction of two-photon contributions to the proton form factors
• Model-dependence of the $\gamma Z$ dispersion correction to the parity-violating asymmetry in elastic $ep$ scattering
• The Proton Radius from Electron Scattering Data
• Nucleon structure from basis light-front quantization
• Flavor decomposition of the nucleon electromagnetic form factors
• Analysis of nucleon electromagnetic form factors from light-front holographic QCD : The spacelike region
• Nucleon electromagnetic form factors and polarization observables in space-like and time-like regions
• Experimental constraints on non-linearities induced by two-photon effects in elastic and inelastic Rosenbluth separations
• The structure function method applied to polarized and unpolarized electron-proton scattering: a solution of the G_E(p)/G_M(p) discrepancy
• Resonance estimates for single spin asymmetries in elastic electron-nucleon scattering
• Parameterization and applications of the low-$Q^2$ nucleon vector form factors
• Precise determination of low-Q nucleon electromagnetic form factors and their impact on parity-violating e-p elastic scattering
• Measurement of two-photon exchange effect by comparing elastic $e^{\pm }p$ cross sections
• Is there model-independent evidence of the two-photon-exchange effect in the electron-proton elastic scattering cross section?
• Applications of quark-hadron duality in F2 structure function
• Search for evidence of two photon contribution in elastic electron proton data
• Determination of two-photon exchange amplitudes from elastic electron-proton scattering data
• Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors
• Phenomenological analysis of two-photon exchange effects in proton form factor measurements
• Electroproduction of Eta Mesons in the S11(1535) Resonance Region at High Momentum Transfer
• An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab
• Nucleon Form Factors - A Jefferson Lab Perspective
• Electromagnetic nucleon form factors in instant and point form
• Reexamination of phenomenological two-photon exchange corrections to the proton form factors and e+-p scattering
• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• The OLYMPUS Experiment
• Parity Violation in Elastic Electron-Nucleon Scattering: Strangeness Content in the Nucleon
• Analyzing power in elastic scattering of the electrons off a spin-0 target
• Dispersive contributions to $e^{+}p/e^{-}p$ cross section ratio in forward regime
• Longitudinal-Transverse Separations of Structure Functions at Low $Q^2$ for Hydrogen and Deuterium
• Two-photon exchange amplitudes for the elastic $ep$ scattering at Q^2=2.5 GeV^2 from the experimental data
• Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering
• Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction ${}^3{\mathrm{He}}^{\uparrow }(e,e^{\prime })X$
• Effects of a spin-flavour dependent interaction on the baryon mass spectrum
• Reanalysis of Rosenbluth measurements of the proton form factors
• Study of the A(e,e'${\pi }^{+}$) Reaction on ${}^1$H, ${}^2$H, ${}^{12}$C, ${}^{27}$Al, ${}^{63}$Cu and ${}^{197}$Au
• The Role of Mesons in the Electromagnetic Form Factors of the Nucleon
• Neutral Pion Electroproduction in the Resonance Region at High $Q^2$
• Demonstration of a novel technique to measure two-photon exchange effects in elastic $e^{\pm }p$ scattering
• Measurements of the Separated Longitudinal Structure Function F_L from Hydrogen and Deuterium Targets at Low Q^2
• Nucleon Electromagnetic Form Factors in QCD
• Exclusive $\eta$ electroproduction at $W>2$ GeV with CLAS and transversity generalized parton distributions
• Effects of a spin-flavour dependent interaction on light-flavoured baryon helicity amplitudes
• Beam normal spin asymmetry in the quasi-RCS approximation
• Two-Photon Exchange Contribution to Proton Form Factors in Time-Like region
• New evaluation of axial nucleon form factor from electron- and neutrino-scattering data and impact on neutrino-nucleus cross-section
• Model independent analysis of polarization effects in elastic electron deuteron scattering in presence of two--photon exchange
• Phenomenological extraction of two-photon exchange amplitudes from elastic electron-proton scattering cross section data
• Nucleon Form Factors to Next-to-Leading Order with Light-Cone Sum Rules
• Nuclear medium effects in structure functions of nucleon at moderate $Q^2$
• Doubly virtual Compton scattering and the beam normal spin asymmetry
• The proton and deuteron F_2 structure function at low Q^2
• On radiative corrections for unpolarized electron proton elastic scattering
• Light-cone QCD Sum Rules for the $\Lambda$ Baryon Electromagnetic Form Factors and its magnetic moment
• Impact of nuclear dependence of R=σ_L/σ_T on antishadowing in nuclear structure functions
• Moments of the longitudinal proton structure function F_L from global data in the Q^2 range 0.75-45.0 (GeV/c)^2
• Hypercentral Constituent Quark Model with a Meson Cloud
• Eikonal representation in the momentum-transfer space
• Eikonal zeros in the momentum transfer space from proton-proton scattering: An empirical analysis
• Electromagnetic form factors of ${\Lambda }_b$ in the Bethe-Salpeter equation approach
• How much two-photon exchange is needed to resolve the proton form factor discrepancy?
• Proton Form Factor Ratio, ${\mu }_p{G}_E^p/G_M^p$ from Double Spin Asymmetry
• Q^2 Evolution of Generalized Baldin Sum Rule for the Proton
• Spin Effects in Long Range Electromagnetic Scattering
• Unpolarized structure functions at Jefferson Lab
• Radiative corrections for electron proton elastic scattering taking into account high orders and hard photon emission
• Nucleon form factors and parton distributions in nonlocal chiral effective theory
• Understanding the systematic differences in extractions of the proton electric form factors at low-$Q^2$
• Meson exchange effects in elastic $ep$ scattering at loop level and the electromagnetic form factors of the proton
• Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment
• Form factor ratio from unpolarized elastic electron proton scattering
• Neutron Electromagnetic Form Factors
• Extraction of the neutron F2 structure function from inclusive proton and deuteron deep-inelastic scattering data
• Measurement of the Nucleon Structure Function F2 in the Nuclear Medium and Evaluation of its Moments
• Rosenbluth Nonlinearity from Two-Photon Exchange
• Determination of two-photon exchange via $e^{+}p/e^{-}p$ Scattering with CLAS12
• Two photon exchange in elastic electron scattering off hadronic systems
• Measuring the lepton sign asymmetry in elastic electron-proton scattering with OLYMPUS
• A simple qualitative description of EMC ratios μ^A for 0.2 <~ x <~ 1.5 and some sample calculations
• Nucleon form factors: the space-time connection
• Long Range Electromagnetic Effects involving Neutral Systems and Effective Field Theory
• Electromagnetic and Axial-Vector Form Factors of the Quarks and Nucleon
• Spin rotation as an element of polarization experiments on elastic electron-proton scattering
• Polarization transfer in ${\vec{e}}^{+}p\to e^{+}\vec{p}$ scattering using the Super BigBite Spectrometer
• Electromagnetic form factors and polarizations of non-Dirac particles with rest spin 1/2
• Electromagnetic nucleon form factors in the extended vector meson dominance model
• Note on the electromagnetic radius of proton
• Electroweak form factors of baryons in dense nuclear matter
• On Distribution Functions for Partons in Nuclei
• Probing the limits of quantum theory with quantum information at subnuclear scales
• Improved radiative corrections and proton charge form factor from the Rosenbluth separation technique
• Proton and neutron form factors with quark orbital excitations
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Impact of new particles on the ratio of Electromagnetic form factors
• Nucleon Form Factors in a Light-Cone Quark Model with Two-Photon Exchange
• Determination of the moments of the proton charge density
• Electromagnetic form factors of ${\Lambda }_c$ in the Bethe-Salpeter equation approach
• Direct TPE Measurement via $e^{+}p/e^{-}p$ Scattering at low $\epsilon$ in Hall A
• Positron Beams and Two-Photon Exchange: The Key to Precision Form Factors
• 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
• Two-Photon Exchange: Future experimental prospects
• A measurement of two-photon exchange in Super-Rosenbluth separations with positron beams
• Testing Parameterizations of the Deuteron Quasi-Elastic Peak
• Investigation of Medium Modifications to ${}^{12}$C Structure Functions in the Resonance Region
• Theory of QED radiative corrections to neutrino scattering at accelerator energies
• Two-photon contributions to the Rosenbluth cross-section in the Skyrme model
• Two-Photon Exchange and Electromagnetic Proton Form Factors