Quartet S Wave Neutron Deuteron Scattering in Effective Field Theory

Abstract

The real and imaginary part of the quartet S wave phase shift in nd scattering (^4 S_{3/2}) for centre-of-mass momenta of up to 300 MeV (E_cm \approx 70 MeV) is presented in effective field theory, using both perturbative pions and a theory in which pions are integrated out. As available, the calculation agrees with both experimental data and potential model calculations, but extends to a higher, so far untested momentum régime above the deuteron breakup point. A Lagrangean more feasible for numerical computations is derived.

27 pages LaTeX2e with 11 figures, uses packages includegraphicx (6 .eps files), color and feynmp (necessary Metapost files included). Corrections in bibliography and NNLO results added above breakup

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