Covariant Spectator Theory of $np$ scattering: Deuteron form factors

Abstract

The deuteron form factors are calculated using two model wave functions obtained from the 2007 CST high precision fits to $np$ scattering data. Included in the calculation are a new class of isoscalar $np$ interaction currents which are automatically generated by the nuclear force model used in these fits. If the nuclear model WJC2 is used, a precision fit (${\chi }^2$/datum $\eqsim 1$) to the Sick Global Analysis (GA) of all $ed$ elastic scattering data can be obtained by adjusting the unknown off-shell nucleon form factors $F_3(Q^2)$ (discussed before) and $F_4(Q^2)$ (introduced in this paper), and predicting the high $Q^2$ behavior of the neutron charge form factor $G_{En}(Q^2)$ well beyond the region where it has been measured directly. Relativistic corrections, isoscalar interaction currents, and off-shell effects are defined, discussed, and their size displayed. A rationale for extending $ed$ elastic scattering measurements to higher $Q^2$ is presented.

36 pages, 24 figures (many with 2 or 3 panels)

References in corpus (6)

• Nucleon Electromagnetic Form Factors
• Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
• Covariant spectator theory for the electromagnetic three-nucleon form factors: Complete impulse approximation
• Covariant Spectator Theory of np scattering: Deuteron magnetic moment and form factors
• Covariant Spectator Theory of np scattering: Isoscalar interaction currents
• Covariant Spectator Theory of np scattering: Deuteron Quadrupole Moment

Cited by in corpus (4)

• High-accuracy calculation of the deuteron charge and quadrupole form factors in chiral effective field theory
• Hadron and light nucleus radii from electron scattering
• Advanced extraction of the deuteron charge radius from electron-deuteron scattering data
• Removal of singularities from the covariant spectator theory