KKbar photoproduction from protons

Abstract

We study the contribution of the Drell mechanism driven by K^+ and K^- exchange to the reaction gamma N -> KKbar N. Our calculation implements the full KN and KbarN reaction amplitudes in the form of partial wave amplitudes taken from a meson-exchange model (KN) and a partial wave analysis (KbarN), respectively. Comparing our results to data of the LAMP2 collaboration we observe that the Drell mechanism alone cannot describe the large Lambda(1520) photoproduction rate observed experimentally. We argue that the discrepancy could be due to significant contributions from K*-meson exchange with subsequent excitation of the Lambda(1520) resonance. After adding such contributions to our model a good agreement of the LAMP2 experiment is achieved. When applying the same model to the recent SAPHIR data we find an excellent description of the K^+p spectrum and can determine the parameters of the Lambda(1600) P01 resonance, M_R = 1617 +/- 2 MeV and Gamma_R = 117 +/- 4 MeV, from the K^-p mass distribution.

updated version, analysis of new CLAS data included, 11 pages, 11 figures

References in corpus (26)

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• A Phenomenological Lagrangian Approach to Two Kaon Photoproduction and Pentaquark Searches
• Search for ${\Theta }^{++}$ Pentaquarks in the Exclusive Reaction $\gamma p\to K^{+}{K}^{-}p$
• Okubo-Zweig-Iizuka rule violation in photoproduction
• Comparative Regge analysis of $\Lambda ,{\Sigma }^0,\Lambda (1520)$ and ${\Theta }^{+}$ production in $\gamma p$, $\pi p$ and $pp$ reactions
• Some aspects of ${\Theta }^{+}$ parity determination in the reaction $\gamma N\to {\Theta }^{+}\bar{K}\to NK\bar{K}$
• The K^- αscattering length and the reaction dd \to αK^+ K^-
• Photoproduction of Lambda(1520,3/2^-)
• Production of Lambda(1520)

Cited by in corpus (11)

• Differential Photoproduction Cross Sections of the Sigma0(1385), Lambda(1405), and Lambda(1520)
• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance
• Searching for signatures around 1920 MeV of a $N^{\ast }$ state of three hadron nature
• 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
• Study of the $\gamma d\to K^{+}{K}^{-}np$ reaction and an alternative explanation for the "${\Theta }^{+}(1540)$ pentaquark" peak
• $A$ dependence of the $\gamma$- and $p$-induced production of the $\Lambda (1520)$ from nuclei
• Pion Photoproduction off Nucleon with Hamiltonian Effective Field Theory
• Gamma-ray Astronomy with Muons: Sensitivity of IceCube to PeVatrons in the Southern Sky
• Meson resonances in forward-angle ${\pi }^{+}{\pi }^{-}$ photoproduction
• Producing $\Lambda (1405)$ and $\Lambda (1520)$ in ${\pi }^{-}p$ reaction to explore their inner structures