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Redundance of Delta-isobar Parameters in Effective Field Theories

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arxiv hep-ph/9606432 v2 pith:UORDVALV submitted 1996-06-25 hep-ph nucl-th

Redundance of Delta-isobar Parameters in Effective Field Theories

classification hep-ph nucl-th
keywords deltaeffectivefieldparameterstheoriesdegreedynamicalexplicit
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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