Measurements of elastic electron-proton scattering at large momentum transfer

• Published in: Physical review. D, Particles and fields Vol. 48; no. 1; pp. 29 - 55
• Main Authors: SILL, A. F, ARNOLD, R. G, SZALATA, Z. M, SHERDEN, D. J, LAMBERT, J. M, LOMBARD-NELSEN, R. M, BOSTED, P. E, CHANG, C. C, GOMEZ, J, KATRAMATROU, A. T, MARTOFF, C. J, PETRATOS, G. G, RAHBAR, A. A, ROCK, S. E
• Format: Journal Article
• Language: English
• Published: Ridge, NY American Physical Society 01-07-1993
• Subjects: 662330 - Photon & Charged-Lepton Interactions with Hadrons-; 662390 - Electromagnetic Processes & Properties- (1992-); CORRECTIONS; CROSS SECTIONS; DIFFERENTIAL CROSS SECTIONS; DIRAC FORM FACTORS; ELASTIC SCATTERING; ELECTROMAGNETIC FORM FACTORS; ELECTRON-NUCLEON INTERACTIONS; ELECTRON-PROTON INTERACTIONS; Exact sciences and technology; FIELD THEORIES; FORM FACTORS; FOUR MOMENTUM TRANSFER; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; MOMENTUM TRANSFER; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; Photon and charged-lepton interactions with hadrons; Physics; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; QUANTUM CHROMODYNAMICS; QUANTUM FIELD THEORY; RADIATIVE CORRECTIONS; SCATTERING; Specific reactions and phenomenology; The physics of elementary particles and fields; Perturbation theory; Quantum chromodynamic; Elastic scattering; Magnetic form factor; Electron proton scattering; Electron beam; Linear accelerator; Scaling law; Differential cross section; Momentum transfer; Proton; Form factor; Electrons
• ISSN: 0556-2821; 1089-4918
• DOI: 10.1103/physrevd.48.29

Measurements of the forward-angle differential cross section for elastic electron-proton scattering were made in the range of momentum transfer from [ital Q][sup 2]=2.9 to 31.3 (GeV/[ital c])[sup 2] using an electron beam at the Stanford Linear Accelerator Center. The data span six orders of magnitude in cross section. Combinded statistical and systematic uncertainties in the cross section measurements ranged from 3.6% at low [ital Q][sup 2] to 19% at high [ital Q][sup 2]. These data have been used to extract the proton magnetic form factor [ital G][sub [ital M]][sup [ital p]]([ital Q][sup 2]) and Dirac form factor [ital F][sub 1][sup [ital p]]([ital Q][sup 2]) by using form factor scaling. The logarithmic falloff of [ital Q][sup 4][ital F][sub 1][sup [ital p]] expected from leading twist predictions of perturbative quantum chromodynamics is consistent with the new data at high [ital Q][sup 2]. Some nonperturbative and hybrid calculations also agree with our results.