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

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

2005-01-15

arxiv.org/abs/hep-ph/0501135v1

Nucl.Phys. A755 (2005) 423-426

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 8 figures, Talk given at International Workshop on BARYONS04, Ecole polytechnique, Paris, France, 25-29 Oct 2004

Scientific paper

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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