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Possible methods for the determination of the $P$-parity of the $Θ^+$-pentaquark in NN-collisions

Michail P. Rekalo·Egle Tomasi-Gustafsson
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Abstract

We present two possibilities to determine the P-parity of the pentaquark $Θ^+$, in a model independent way, via the measurement of polarization observables in $p+p\to Θ^+ +Σ^+$, or $n+p\to Θ^+ +Λ^0$, in the near threshold region. Besides the measurement of the spin correlation coefficient, $A_{xx}=A_{yy}$, (in collisions of transversally polarized nucleons), the coefficient $D_{xx}$ of polarization transfer from the initial proton to the final $ Σ^+(Λ^0)$ hyperon is also unambiguously related to the $Θ^+$ parity.

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Michail P. Rekalo, Egle Tomasi-Gustafsson. 2004-01-22. Possible methods for the determination of the $P$-parity of the $Θ^+$-pentaquark in NN-collisions. https://doi.org/10.1016/j.physletb.2004.04.041

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