Is the K-matrix approach adequate for describing overlapping resonances?

Abstract

The K-matrix method is widely used unitary parametrization for several resonances with the same quantum numbers. But in fact resonances in this approach are separated and do not overlap.

arXiv admin note: text overlap with arXiv:2002.07568

References in corpus (1)

• Preserving unitarity for overlapping multichannel states: Breit-Wigner versus K matrix -- comparison, advantages and disadvantages