Time Delay and Time Advance in Resonance Theory

Details Time Delay and Time Advance in Resonance Theory Time Delay and Time Advance in Resonance Theory

2006-08-10

arxiv.org/abs/nucl-th/0608027v1

Nucl.Phys. A735 (2004) 515-539

Physics

Nuclear Physics

Nuclear Theory

30 pages, 7 figures

Scientific paper

10.1016/j.nuclphysa.2004.02.012

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.

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