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

Sérgio Alexandre Pinto, Alfred Stadler, and Franz Gross
Phys. Rev. C 79, 054006 – Published 20 May 2009

Abstract

We present the first calculations of the electromagnetic form factors of He3 and H3 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.

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  • Received 26 January 2009

DOI:https://doi.org/10.1103/PhysRevC.79.054006

©2009 American Physical Society

Authors & Affiliations

Sérgio Alexandre Pinto and Alfred Stadler

  • Centro de Física Nuclear da Universidade de Lisboa, 1649-003 Lisboa, Portugal and Departamento de Física da Universidade de Évora, 7000-671 Évora, Portugal

Franz Gross

  • Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and College of William and Mary, Williamsburg, Virginia 23187, USA

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Issue

Vol. 79, Iss. 5 — May 2009

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