In-medium meson properties and field transformations

Abstract

Since the existing calculations of the effective meson mass in nuclear medium involve approximations, it is important to examine whether they satisfy the general requirement of the equivalence theorem that the physical observables should be independent of the choice of field variables. We study here consequences of nucleon field transformations. As an illustrative case we consider the in-medium effective pion mass calculated for the s-wave pion-nucleon interaction in the linear density approximation. We demonstrate that it is necessary to include the Born term explicitly in order that the effective pion mass should obey the equivalence theorem.

10 pages, using RevTeX4. More detailed discussion, references added. To be published in Phys. Rev. C

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Cited by in corpus (5)

• Instability of Ultra-Spinning Black Holes
• Effective Field Theory calculations of $NN\to NN\pi$
• S-wave pion condensation in symmetric nuclear matter
• Gauge symmetric delta(1232) couplings and the radiative muon capture in hydrogen
• Density resummation of perturbation series in a pion gas to leading order in chiral perturbation theory