Redundance of Delta-isobar Parameters in Effective Field Theories
classification
✦ hep-ph
nucl-th
keywords
deltaeffectivefieldparameterstheoriesdegreedynamicalexplicit
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It is shown that the off-shell parameters in the interaction Lagrangian of pions, nucleons, and $\Delta$-isobars are redundant in the framework of effective field theories. Our results also suggest the necessity of including the $\Delta$ as an explicit dynamical degree of freedom.
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Cited by 1 Pith paper
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Neutrinoless double-beta decay of the $\Delta^-$ resonance
Chiral EFT derivation of the Δ⁻ → p e⁻ e⁻ amplitude including long-range neutrino loops, short-range counterterms, pion-mass dependence for collinear electrons, and a long-range prediction in the degenerate Δ-nucleon ...
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