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We consider the interplay of the pentaquark states and strange tetraquark states in the decay [Formula: see text]. Possible existence of ([Formula: see text])-states is taken up and their manifestation in the [Formula: see text]-channel is discussed. It is emphasized that these exotic mesons can imitate broad bumps in the [Formula: see text]-channel.
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Anisovich et al. (2015) studied this question.
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