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

Abstract

We present the first calculations of the electromagnetic form factors of ${}^3$He and ${}^3$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 non-relativistic framework, such as "Z-graphs", but omits other two and three-body currents. We compare our results to non-relativistic calculations augmented by relativistic corrections of $\mathcal{O}(v/c{)}^2$.

30 pages, 13 figures, 6 tables

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Cited by in corpus (9)

• 50 Years of Quantum Chromodynamics
• Electromagnetic Structure of Few-Nucleon Ground States
• Pion electromagnetic form factor in the Covariant Spectator Theory
• First results for electromagnetic three-nucleon form factors from high-precision two-nucleon interactions
• Covariant Spectator Theory of $np$ scattering: Deuteron form factors
• JLab Measurements of the 3He Form Factors at Large Momentum Transfers
• Relativistic rank-one separable kernel for helium-3 charge form factor
• Relativistic descriptions of few-body systems
• Removal of singularities from the covariant spectator theory