Measurements of elastic electron-proton scattering at large momentum transfer

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.29· OSTI ID:6430720

Sill, A F; Arnold, R G; Bosted, P E; Chang, C C; Gomez, J; Katramatou, A T; Martoff, C J; Petratos, G G; Rahbar, A A; Rock, S E; Szalata, Z M ^[1]; Sherden, D J ^[2]; Lambert, J M ^[3]; Lombard-Nelsen, R M ^[4]

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1. Department of Physics, The American University, Washington, D.C. 20016 (United States)
2. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
3. Department of Physics, Georgetown University, Washington, D.C. 20057 (United States)
4. DAPNIA/SPhN, CE Saclay, Gif-sur-Yvette, 91191 CEDEX (France)

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.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6430720
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662330* -- Photon & Charged-Lepton Interactions with Hadrons-- (1992)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DIRAC FORM FACTORS
ELASTIC SCATTERING
ELECTROMAGNETIC FORM FACTORS
ELECTRON-NUCLEON INTERACTIONS
ELECTRON-PROTON INTERACTIONS
FIELD THEORIES
FORM FACTORS
FOUR MOMENTUM TRANSFER
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MOMENTUM TRANSFER
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATIVE CORRECTIONS
SCATTERING