Baryon Current Matrix Elements in a Light-Front Framework

Details Baryon Current Matrix Elements in a Light-Front Framework Baryon Current Matrix Elements in a Light-Front Framework

1994-11-17

arxiv.org/abs/nucl-th/9411016v1

Phys.Rev. D51 (1995) 3598-3612

Physics

Nuclear Physics

Nuclear Theory

32 pages, LaTeX, 10 postscript figures, uses epsf.sty; figures uuencoded with uufiles (or available by request in .ps or hardc

Scientific paper

10.1103/PhysRevD.51.3598

Current matrix elements and observables for electro- and photo-excitation of baryons from the nucleon are studied in a light-front framework. Relativistic effects are estimated by comparison to a nonrelativistic model, where we use simple basis states to represent the baryon wavefunctions. Sizeable relativistic effects are found for certain transitions, for example, to radial excitations such as that conventionally used to describe to the Roper resonance. A systematic study shows that the violation of rotational covariance of the baryon transition matrix elements stemming from the use of one-body currents is generally small.

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