Covariant spectator theory for the electromagnetic three-nucleon form factors: Complete impulse approximation

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.054006· OSTI ID:21286927

Pinto, Sergio Alexandre; Stadler, Alfred; Gross, Franz ^[1]

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1. Centro de Fisica Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal and Departamento de Fisica da Universidade de Evora, 7000-671 Evora (Portugal)

We present the first calculations of the electromagnetic form factors of {sup 3}He and {sup 3}H within the framework of the Covariant Spectator Theory (CST). This first exploratory study concentrates on the sensitivity of the form factors to the strength of the scalar meson-nucleon off-shell coupling, known from previous studies to have a strong influence on the three-body binding energy. Results presented here were obtained using the complete impulse approximation (CIA), which includes contributions of relativistic origin that appear as two-body corrections in a nonrelativistic framework, such as 'Z-graphs', but omits other two and three-body currents. We compare our results to nonrelativistic calculations augmented by relativistic corrections of O(v/c){sup 2}.

• OSTI ID: 21286927
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
COMPARATIVE EVALUATIONS
CORRECTIONS
COUPLING
ELECTROMAGNETIC FORM FACTORS
HELIUM 3
IMPULSE APPROXIMATION
NUCLEONS
RELATIVISTIC RANGE
SCALAR MESONS
SENSITIVITY
THREE-BODY PROBLEM
TRITIUM
TWO-BODY PROBLEM