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On Gamov states of Sigma^+ hyperons

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arxiv 1801.06675 v1 pith:GVOJAUI7 submitted 2018-01-20 nucl-th

On Gamov states of Sigma^+ hyperons

classification nucl-th
keywords sigmacapturecomponentgamovstatesamadeusconsequenceconsequences
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Both the FINUDA and AMADEUS experiments evidenced a low $\Sigma^+$ momentum component when investigating $\Sigma^+ \pi^-$ pairs produced in K$^-$ nuclear capture. This component is interpreted as a consequence of Gamov state formation, with the hyperon trapped in the Coulomb field of the residual nucleus. Description of such states and their participation in the capture reaction is presented. Some consequences are indicated.

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