Kaon photoproduction in a multipole approach

Abstract

The recently published experimental data on K+Lambda photoproduction by the SAPHIR, CLAS, and LEPS collaborations are analyzed by means of a multipole approach. For this purpose the background amplitudes are constructed from appropriate Feynman diagrams in a gauge-invariant and crossing-symmetric fashion. The results of our calculation emphasize the lack of mutual consistency between the SAPHIR and CLAS data previously found by several independent research groups, whereas the LEPS data are found to be more consistent with those of CLAS. The use of SAPHIR and CLAS data, individually or simultaneously, leads to quite different resonance parameters which, therefore, could lead to different conclusions on ``missing resonances''. Fitting to the SAPHIR and LEPS data simultaneously indicates that the S_{11}(1650), P_{13}(1720), D_{13}(1700), D_{13}(2080), F_{15}(1680), and F_{15}(2000) resonances are required, while fitting to the combination of CLAS and LEPS data leads alternatively to the P_{13}(1900), D_{13}(2080), D_{15}(1675), F_{15}(1680), and F_{17}(1990) resonances. Although yielding different results in most cases, both SAPHIR and CLAS data indicate that the second peak in the cross sections at W = 1900 MeV originates from the D_{13}(2080) resonance with a mass between 1911 - 1936 MeV. Furthermore, in contrast to the results of currently available models and the Table of Particle Properties, both data sets do not exhibit the need for a P_{11}(1710) resonance. The few data points available for target asymmetry can not be described by the models proposed in the present work.

33 pages, 14 figures

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• Quasi-Two-Body Decays of Nonstrange Baryons
• Differential Cross Sections for gamma + p --> K+ + Y for Lambda and Sigma0 Hyperons
• Measurement of gamma p --> K+ Lambda and gamma p --> K+ Sigma0 at photon energies up to 2.6 GeV
• Evidence for a missing nucleon resonance in kaon photoproduction
• Strange Decays of Nonstrange Baryons
• Hyperon Photoproduction in the Nucleon Resonance Region
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Cited by in corpus (39)

• Baryon spectroscopy
• Progress Toward Understanding Baryon Resonances
• ${\pi }^{+}$ photoproduction on the proton for photon energies from 0.725 to 2.875 GeV
• eta-photoproduction in the resonance energy region
• Differential cross sections and recoil polarizations for the reaction gamma p -> K+ Sigma0
• Eta-meson production in the resonance energy region
• Light Baryon Spectroscopy
• The impact of ${\mathbf{K}}^{+}\mathbf{\Lambda }$ photoproduction on the resonance spectrum
• Beam-Recoil Polarization Transfer in the Nucleon Resonance Region in the Exclusive $\vec{e}p\to e^{\prime }{K}^{+}\vec{\Lambda }$ and $\vec{e}p\to e^{\prime }{K}^{+}{\vec{\Sigma }}^0$ Reactions at CLAS
• Production of Lambda and Sigma^0 hyperons in proton-proton collisions
• Photoproduction of $K\Lambda$ on the proton
• Electromagnetic production of kaon near threshold
• Electroproduction of kaons from the proton in a Regge-plus-resonance approach
• Photo- and electroproduction of the K^0Lambda near threshold and effects of the K^0 electromagnetic form factor
• Origin of the second peak in the cross section of the $K^{+}\Lambda$ photoproduction
• Analysis of the consistency of kaon photoproduction data with Lambda in the final state
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Electromagnetic production of $K\Sigma$ on the nucleon near threshold
• Evidence for the J^p=1/2^+ narrow state at 1650 MeV in the photoproduction of KLambda
• Separated Structure Functions for Exclusive $K^{+}\Lambda$ and $K^{+}{\Sigma }^0$ Electroproduction at 5.5 GeV with CLAS
• Photo- and Electroproduction of the Hypertriton on 3He
• Constraining the mass and width of the $N^{\ast }(1685)$ resonance
• Energy-independent PWA of the reaction $\gamma p\to K^{+}\Lambda$
• $K^{+}\Lambda$ photoproduction at forward angles and low momentum transfer
• New fits to the reaction $\gamma p\to K^{+}\Lambda$
• Coupled $K^{+}\Lambda$ and $K^0\Lambda$ photoproduction off the nucleon: Consequences from the recent CLAS and MAMI data and the $N(1680)P_{11}$ narrow state
• Coupling strength of the $N^{\ast }(1535)S_{11}$ to the $K^{+}\Lambda$ channel
• Photoproduction of hypernuclei within the quark-meson coupling model
• Progress and Issues in the Electromagnetic Production of Kaon on the Nucleon
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Gerasimov-Drell-Hearn Sum Rule and the Discrepancy between the New CLAS and SAPHIR Data
• Strangeness Electromagnetic Production on Nucleons and Nuclei
• Application of the single-channel, single-energy AA/PWA method to $K^{+}\Lambda$ photoproduction
• Evidence of the non-strange partner of pentaquark from the elementary $K^{+}\Lambda$ photoproduction
• Weak production of strange $\Xi$ baryons off the nucleon
• Irreducible tensor approach to spin observables in photo production of mesons with arbitrary spin-parity $s^{\pi }$
• Kaon photoproduction on the nucleon with constrained parameters
• From Pauli Principle to Hypernucleus, Neutron Star, and Econophysics
• A Simple Quark Model for γp -> K^+ Λ^0