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Abstract: We consider the production and scattering amplitudes of heavy mesons in asituation, where there are two closely spaced narrow resonances, whichstructure we refer to as a diresonance. Assuming strong overlapping of theresonances coupled to common channels, it is found, using the unitarity andanalyticity constraints, that the production amplitudes in different channelsshould have similar behavior with energy. In particular the ratio of thecoefficients for each pole contribution to the production amplitude is fixed at-1.



Author: S. Dubynskiy, M.B. Voloshin

Source: https://arxiv.org/







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