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Title: Covariant spectator theory for the electromagnetic three-nucleon form factors: Complete impulse approximation
Authors: Pinto, Sérgio Alexandre
Stadler, Alfred
Gross, Franz
Keywords: Three-nucleon bound states
Electromagnetic form factors
Covariant Spectator Theory
Relativistic effects
Issue Date: 2009
Publisher: The American Physical Society
Citation: Phys. Rev. C 79, 054006 (2009)
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 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)2.
Type: article
Appears in Collections:FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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