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Determination of the parity of the pentaquark baryons : Theta^+ and Xi_5

Seung-Il Nam·Atsushi Hosaka·Hyun-Chul Kim
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Abstract

We study determination of the parity of the pentaquark baryons in two different processes. First, we investigate the Theta^+ production via the vec{p} vec{p} -> Sigma^+ Theta^+ reaction process which was proposed to determine unambiguously the parity of Theta^+. We observe the clear differences in the total cross sections and the spin observable A_{xx}. As for the Xi_5 in the bar{K} N -> K Xi_5 reaction process, the total cross section for the positive parity presents about one hundred times lager than that of the negative one due to the huge destructive interference.

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Seung-Il Nam, Atsushi Hosaka, Hyun-Chul Kim. 2005-01-15. Determination of the parity of the pentaquark baryons : Theta^+ and Xi_5. https://doi.org/10.1016/j.nuclphysa.2005.03.049

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