Abstract
We clarify the discrepancies of previous results for the masses and decay amplitudes of hermaphrodite mesons obtained from QCD sum rules. We study the case of the strange quark within a light quark expansion formalism. We find tht the hermaphrodite masses are much higher than the ones of their ordinary meson partners. Our values of the set of masses and continuum thresholds are compared with some other sum rule results. We analyze the hadronic couplings of the isovector 1−+ exotic hermaprodite\(\tilde \rho \) using a three-point function sum rule evaluated at the symmetric euclidean point. We find that the\(\tilde \rho \) can be very broad and prefers to decay into ρπ andK * K. Its most characteristic decays are the ones into πγ, ηπ and μ′π. The former and the latter are of the order of (3∼8) MeV.
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Work partially supported by the CNRS (France within the France-Italy-Spain exchange program (AI Europe) and by Plan Mo vilizador de Altas Energias (Spain)
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Latorre, J.I., Pascual, P. & Narison, S. Spectra and hadronic couplings of light hermaphrodite mesons. Z. Phys. C - Particles and Fields 34, 347–360 (1987). https://doi.org/10.1007/BF01548817
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DOI: https://doi.org/10.1007/BF01548817