Time Delay and Time Advance in Resonance Theory
arXiv:nucl-th/0608027 · doi:10.1016/j.nuclphysa.2004.02.012
Abstract
We propose a theory of the resonance-antiresonance scattering process which differs considerably from the classical one (the Breit-Wigner theory), which is commonly used in the phenomenological analysis. Here both resonances and antiresonances are described in terms of poles of the scattering amplitude: the resonances by poles in the first quadrant while the antiresonances by poles in the fourth quadrant of the complex angular momentum plane. The latter poles are produced by non-local potentials, which derive from the Pauli exchange forces acting among the nucleons or the quarks composing the colliding particles.
arXiv comment30 pages, 7 figures
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