Vector Meson Propagator and Baryon Current Conservation

Details Vector Meson Propagator and Baryon Current Conservation Vector Meson Propagator and Baryon Current Conservation

2001-01-20

arxiv.org/abs/nucl-th/0101044v2

Phys.Lett. B514 (2001) 33-40

Physics

Nuclear Physics

Nuclear Theory

9 pages (LaTeX file), 3 figures (PostScript file)

Scientific paper

10.1016/S0370-2693(01)00772-9

If baryons couple only with $\omega $-mesons, one found the baryon spectral function may be negative. We show this unacceptable result is caused by the $k_\mu k_\nu $-terms in the $\omega $-meson propagator. Their contribution may not vanish in approximate calculations which violate the baryon current conserves. A rule is suggested, by which the calculated baryon spectral function is well behaved.

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