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- W1637211068 abstract "We perform a study of the final state interactions of the K^+ bar{K^0} and the bar{K^0}d systems in the reactions pp to d K^+ bar{K^0} and pp to d pi^+ eta. Since the two-meson system couples strongly to the a_0(980) resonance, these reactions are expected to be an additional source of information about the controversial scalar sector. We also show that these reactions present peculiar features which can shed additional light on the much debated meson-baryon scalar sector with strangeness -1. We deduce the general structure of the amplitudes close to the d K^+bar{K}^0 threshold, allowing for primary K^+ bar{K^0} as well as pi^+eta production with the two mesons in relative S- or P-wave. The interactions of the mesons are accounted for by using chiral unitary techniques, which generate dynamically the a_0(980) resonance, and the bar{K^0}d interaction is also taken into account. General formulae are derived that allow to incorporate the final state interactions in these systems for any model of the production mechanism. We illustrate this approach by considering two specific production mechanisms based on three flavor meson-baryon chiral perturbation theory. It is demonstrated that in this scenario the bar{K^0}d interactions are very important and can change the cross section by as much as one order of magnitude. The amount of pi^+eta versus K^+ bar{K^0} production is shown to depend critically on the primary mixture of the two mechanisms, with large interference effects due to final state interactions. These effects are also shown to occur in the event distributions of invariant masses which are drastically modified by the final state interactions of the two-meson or the bar{K}d system." @default.
- W1637211068 created "2016-06-24" @default.
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- W1637211068 date "2001-09-18" @default.
- W1637211068 modified "2023-09-27" @default.
- W1637211068 title "Chiral dynamics and the reactions pp to d K^+ bar{K}^0 and pp to d pi^+ eta" @default.
- W1637211068 hasPublicationYear "2001" @default.
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