Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron

Abstract

We analyze an effect of the coherent ${\Theta }^{+}\Lambda (1520)$ photoproduction in $\gamma D$ interaction near the threshold. We demonstrate that the coherence effect becomes manifest in a comparison of the $n{K}^{+}$ invariant mass distribution when the $p{K}^{-}$ invariant equals the $\Lambda (1520)$ mass. Our model calculations indicate a sizeable contribution of resonant and non-resonant background processes in the $\gamma D\to np{K}^{+}{K}^{-}$ reaction which generally exceed the contribution of the coherent resonant channel. However, we find that the coherent ${\Theta }^{+}\Lambda (1520)$ photoproduction is enhanced relative to the background processes in the forward hemisphere of the $p{K}^{-}$ pair photoproduction. Moreover, the coherence effect does not depend on the ${\Theta }^{+}$ photoproduction amplitude and is defined by the probabilities of the $\Lambda (1520)$ photoproduction and the ${\Theta }^{+}\to NK$ transition. Therefore, this coherence effect may be used as an independent method for studying the mechanism of ${\Theta }^{+}$ production and ${\Theta }^{+}$ properties.

34 pages, 22 figures

References in corpus (8)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Experimental Search for Pentaquarks
• Lambda(1520,3/2^-) photoproduction reaction via gamma N -> K Lambda(1520)
• Analysis of Theta^+ production in K^+Xe collisions
• A Phenomenological Lagrangian Approach to Two Kaon Photoproduction and Pentaquark Searches
• Blast-wave analysis of strange particle $m_T$ spectra in Pb-Pb collisions at the SPS
• Some aspects of ${\Theta }^{+}$ parity determination in the reaction $\gamma N\to {\Theta }^{+}\bar{K}\to NK\bar{K}$
• Photoproduction of Pentaquark in Feynman and Regge Theories

Cited by in corpus (25)

• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance
• Photon induced Lambda(1520) production and the role of the K^* exchange
• Near-threshold Lambda(1520) production by the gamma p -> K+Lambda(1520) reaction at forward K+ angles
• The role of the $N^{\ast }(2080)$ resonance in the $\vec{\gamma }p\to K^{+}\Lambda (1520)$ reaction
• Near-threshold photoproduction of $\Lambda (1520)$ from protons and deuterons
• The roles of nucleon resonances in $\Lambda$(1520) photoproduciton off proton
• Re-analysis of the $\Lambda (1520)$ photoproduction reaction
• The $\Sigma$(1385) photoproduciton from proton within a Regge-plus-resonance approach
• Theoretical study of the $\Lambda$(1520) photoproduction off proton target based on the new CLAS data
• Coupling of \bar K*N to the Lambda(1520)
• $\Lambda (1520)$ and $\Sigma (1385)$ in the nuclear medium
• Preserving Local Gauge Invariance with t-Channel Regge Exchange
• The $K^{\ast 0}\Lambda$ photoproduction off a neutron
• KKbar photoproduction from protons
• Test of the reaction mechanism for gamma N -> K Lambda(1520) using the polarized photon
• Theta+ formation in inclusive gamma D -> pK- X
• $A$ dependence of the $\gamma$- and $p$-induced production of the $\Lambda (1520)$ from nuclei
• To see the exotic Theta^+ baryon from interference
• K*-couplings for the antidecuplet excitation
• Photoproduction of $a_2(1320)$ in a Regge model
• Electroproduction of $\Lambda (1520)$ off the nucleon target with the nucleon resonances
• Photoproduction of $\gamma p\to K^{+}{\Lambda }^{\ast }(1520)$ and decay of ${\Lambda }^{\ast }(1520)\to K^{-}p$ in the Reggeized framework
• SU(3) systematization of baryons
• Producing $\Lambda (1405)$ and $\Lambda (1520)$ in ${\pi }^{-}p$ reaction to explore their inner structures
• Chiral SU(3) Bethe Salpeter Model: Extension to SU(6) and SU(8) Spin-Flavor Symmetries