Does it make any sense to talk about a Delta-isobar?

Details Does it make any sense to talk about a Delta-isobar? Does it make any sense to talk about a Delta-isobar?

2002-12-02

arxiv.org/abs/nucl-th/0212008v1

Few Body Syst.Suppl. 15 (2003) 201-206

Physics

Nuclear Physics

Nuclear Theory

6 pages, no figures; contribution to the 2002 CFIF Fall Workshop on "Nuclear Dynamics: from Quarks to Nuclei", CFIF, IST, Lisb

Scientific paper

It is shortly investigated, on what basis an experimentally observed resonance like the Delta(1232)-isobar can be embedded into the framework of Quantum Theory (QT), i.e. Quantum Field Theory (QFT) and Quantum Mechanics (QM). After a short discussion of the particle concept in the context of the "bootstrap" idea of G. Chew and S. Mandelstam we will focus on the theoretical formalism being necessary to describe resonances in the Lagrangian or Hamiltonian formulation of QT.

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