Infrared regularization with spin-3/2 fields
Véronique Bernard, Thomas R. Hemmert, Ulf-G. Meißner
Abstract
We present a Lorentz-invariant formulation of baryon chiral perturbation theory including spin-3/2 fields. Particular attention is paid to the projection on the spin-3/2 components of the delta fields. We also discuss the nucleon mass and the pion-nucleon sigma term.
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