Measurements of the deuteron and proton magnetic form factors at large momentum transfers

• Published in: Physical review. C, Nuclear physics Vol. 42; no. 1; pp. 38 - 64
• Main Authors: Bosted, PE, Katramatou, AT, Arnold, RG, Benton, D, Clogher, L, DeChambrier, G, Lambert, J, Lung, A, Petratos, GG, Rahbar, A, Rock, SE, Szalata, ZM, Debebe, B, Frodyma, M, Hicks, RS, Hotta, A, Peterson, GA, Gearhart, RA, Alster, J, Lichtenstadt, J, Dietrich, F, van Bibber K
• Format: Journal Article
• Language: English
• Published: United States 01-07-1990
• Subjects: 651220 - Nuclear Properties & Reactions, A=1-5, Experimental; BARYON-BARYON INTERACTIONS; BARYONS; CHARGED PARTICLES; COINCIDENCE METHODS; COUNTING TECHNIQUES; DEUTERONS; ELASTIC SCATTERING; ELECTROMAGNETIC FORM FACTORS; ELECTRON-DEUTERON INTERACTIONS; ELEMENTARY PARTICLES; FERMIONS; FORM FACTORS; HADRON-HADRON INTERACTIONS; HADRONS; IMPULSE APPROXIMATION; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; MOMENTUM TRANSFER; NATIONAL ORGANIZATIONS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEON-NUCLEON INTERACTIONS; NUCLEONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PROTONS; SCATTERING; STANFORD LINEAR ACCELERATOR CENTER; US DOE; US ERDA; US ORGANIZATIONS
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.42.38

Measurements of the deuteron elastic magnetic structure function {ital B}({ital Q}{sup 2}) are reported at squared four-momentum transfer values 1.20{le}{ital Q}{sup 2}{le}2.77 (GeV/{ital c}){sup 2}. Also reported are values for the proton magnetic form factor {ital G}{sub {ital M}{ital p}}({ital Q}{sup 2}) at 11 {ital Q}{sup 2} values between 0.49 and 1.75 (GeV/{ital c}){sup 2}. The data were obtained using an electron beam of 0.5 to 1.3 GeV. Electrons backscattered near 180{degree} were detected in coincidence with deuterons or protons recoiling near 0{degree} in a large solid-angle double-arm spectrometer system. The data for {ital B}({ital Q}{sup 2}) are found to decrease rapidly from {ital Q}{sup 2}=1.2 to 2 (GeV/{ital c}){sup 2}, and then rise to a secondary maximum around {ital Q}{sup 2}=2.5 (GeV/{ital c}){sup 2}. Reasonable agreement is found with several different models, including those in the relativistic impulse approximation, nonrelativistic calculations that include meson-exchange currents, isobar configurations, and six-quark configurations, and one calculation based on the Skyrme model. All calculations are very sensitive to the choice of deuteron wave function and nucleon form factor parametrization. The data for {ital G}{sub {ital M}{ital p}}({ital Q}{sup 2}) are in good agreement with the empirical dipole fit.