14 research outputs found

    Elastic electron deuteron scattering with consistent meson exchange and relativistic contributions of leading order

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    The influence of relativistic contributions to elastic electron deuteron scattering is studied systematically at low and intermediate momentum transfers (Q230Q^2\leq 30 fm2^{-2}). In a (p/M)(p/M)-expansion, all leading order relativistic π\pi-exchange contributions consistent with the Bonn OBEPQ models are included. In addition, static heavy meson exchange currents including boost terms and lowest order ρπγ\rho\pi\gamma-currents are considered. Sizeable effects from the various relativistic two-body contributions, mainly from π\pi-exchange, have been found in form factors, structure functions and the tensor polarization T20T_{20}. Furthermore, static properties, viz. magnetic dipole and charge quadrupole moments and the mean square charge radius are evaluated.Comment: 15 pages Latex including 5 figures, final version accepted for publication in Phys.Rev.C Details of changes: (i) The notation of the curves in Figs. 1 and 2 have been clarified with respect to left and right panels. (ii) In Figs. 3 and 4 an experimental point for T_20 has been added and a corresponding reference [48] (iii) At the end of the text we have added a paragraph concerning the quality of the Bonn OBEPQ potential

    Ownership versus competition: Efficiency in public enterprise

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