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

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.38· OSTI ID:6359722

Bosted, P E; Katramatou, A T; Arnold, R G; Benton, D; Clogher, L; DeChambrier, G; Lambert, J; Lung, A; Petratos, G G; Rahbar, A; Rock, S E; Szalata, Z M ^[1]; Debebe, B; Frodyma, M; Hicks, R S; Hotta, A; Peterson, G A ^[2]; Gearhart, R A ^[3]; Alster, J; Lichtenstadt, J ^[4] ; Dietrich, F; van Bibber, K ^[5]

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1. The American University, Washington, DC (USA)
2. University of Massachusetts, Amherst, MA (USA)
3. Stanford Linear Accelerator Center, Stanford University, Stanford, CA (USA)
4. Tel Aviv University, Tel Aviv (Israel)
5. Lawrence Livermore National Laboratory, Livermore, CA (USA)

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.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6359722
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651220* -- Nuclear Properties & Reactions
A=1-5
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PROTONS
SCATTERING
STANFORD LINEAR ACCELERATOR CENTER
US DOE
US ERDA
US ORGANIZATIONS