Double polarization asymmetry as a possible filter for ${\Theta }^{+}$'s parity

Abstract

We present an analysis of the Beam-Target double polarization asymmetry for the photoproduction of ${\Theta }^{+}$ in $\gamma n\to {\Theta }^{+}{K}^{-}$. We show that this quantity can serve as a filter for the determination of the ${\Theta }^{+}$'s spin-parity assignment near threshold. It is highly selective between $1/2^{+}$ and $1/2^{-}$ configurations due to dynamical reasons.

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References in corpus (8)

• K+ nucleon scattering and exotic S=+1 Baryons
• Understanding Pentaquark States in QCD
• Pentaquark in the Skyrme Model
• Interpretation of the Theta+ as an isotensor pentaquark with weakly decaying partners
• Phenomenology of the Pentaquark Antidecuplet
• Influence of a Z+(1540) resonance on K+N scattering
• ${\Theta }^{+}$ in a chiral constituent quark model and its interpolating fields
• Cross sections for pentaquark baryon production from protons in reactions induced by hadrons and photons

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• On the determination of the parity of the ${\Theta }^{+}$
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• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
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• Spin structure of spin-1/2 baryon and spinless meson production amplitudes in photo and hadronic reactions
• Some aspects of ${\Theta }^{+}$ parity determination in the reaction $\gamma N\to {\Theta }^{+}\bar{K}\to NK\bar{K}$
• Model-independent methods to measure the $P$-parity of the ${\Theta }^{+}$-pentaquark in photoproduction experiments
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• Possibility of determinig the parity of the pentaquark ${\Theta }^{+}$ from photoproduction near threshold
• Antikaon angular distributions in the reaction $\gamma d\to K^{-}{\Theta }^{+}p\to K^{-}{K}^{+}np$ near the threshold and the parity of the ${\Theta }^{+}$ pentaquark
• $P$-parity of charm and strange particles in electroproduction processes, in collinear regime
• The Helicity Amplitude for $1/2$ and $3/2^{+}$ Baryon in the Pseudo-Meson Photoproduction in the Quark Model