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Phenomenological study of two-meson couplings of Theta+

Tetsuo Hyodo·Atsushi Hosaka
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Abstract

We evaluate two-meson couplings of Theta+, using experimental information of nucleon resonances decaying into pi pi N channels, in which the two pions are in scalar- and vector-type correlations. We examine two assignments of spin and parity of J^P=1/2^+ and 3/2^-, for which the experimental spectra of known resonances with exotic baryons are properly reproduced by an octet-antidecuplet representation mixing scheme. With the obtained coupling constants, total cross sections of the reactions pi- p -> K- Theta+ and K+ p -> pi+ Theta+ are calculated. Substantial interference of two terms may occur in the reaction processes for the J^P=1/2^+ case, whereas the interference effect is rather small for the 3/2^- case.

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Tetsuo Hyodo, Atsushi Hosaka. 2005-11-16. Phenomenological study of two-meson couplings of Theta+. https://doi.org/10.1103/physrevc.72.055202%2010.1103%2Fphysrevc.72.069902

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