The Pentaquark $Θ^+$ in $nK^+$ and $pK^0_S$, and its $Σ^+_5$ partner

Details The Pentaquark $Θ^+$ in $nK^+$ and $pK^0_S$, and its $Σ^+_5$ partner The Pentaquark $Θ^+$ in $nK^+$ and $pK^0_S$, and its $Σ^+_5$ partner

2004-04-07

arxiv.org/abs/hep-ph/0404075v3

J.Phys. G31 (2005) L1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1088/0954-3899/31/1/L01

A systematic lowering in mass of strangeness ambiguous $pK^0_S$ peaks relative to the $nK^+$ is noted. We discuss how measurement of $\gamma p\to \Theta^+ K^0_S\to p K^0_S K^0_S \to p\pi^+\pi^-\pi^+\pi^-$ in association with $\gamma p\to \Theta^+ K^0_S\to n K^+ K^0_S$ can help to clarify the nature of the narrow baryon state claimed in $p K^0_S$ invariant mass distributions. This can both establish the $\Theta^+$ in a single experiment and also reveal, or place severe limits on, the existence of an associated $\Sigma_5$ pentaquark.

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