Vector Meson Propagator and Baryon Current Conservation
Wu, S. S. · Zhang, H. X. · Yao, Y. J.
Original · EN
If baryons couple only with ω-mesons, one found the baryon spectral function may be negative. We show this unacceptable result is caused by the kμkν-terms in the ω-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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