$pp\to p{K}^{+}\Lambda$ reaction in an effective Lagrangian model

Abstract

We investigate the $pp\to p{K}^{+}\Lambda$ reaction within an effective Lagrangian model where the contributions to the amplitudes are taken into account within the tree level. The initial interaction between the two nucleons is modeled by the exchange of $\pi$, $\rho$, $\omega$ and $\sigma$ mesons and the $\Lambda K^{+}$ production proceeds via the excitation of the $N^{\ast }$(1650), $N^{\ast }$(1710), $N^{\ast }$(1720) baryonic resonances. The parameters of the model at the nucleon-nucleon-meson vertices are determined by fitting the elastic nucleon-nucleon scattering with an effective interaction based on the exchange of these four mesons, while those at the resonance vertices are calculated from the known decay widths of the resonances as well as the vector meson dominance model. Available experimental data is described well by this approach. The one-pion-exchange diagram dominates the production process at both higher and lower beam energies. The $\rho$ and $\omega$ meson exchanges make negligible contributions. However, the $\sigma$-exchange processes contribute substantially to the total cross sections at lower beam energies. The excitation of the $N^{\ast }$(1710) and $N^{\ast }$(1650) resonances dominate this reaction at beam momenta above and below 3 GeV/c respectively. The interference among the amplitudes of various resonance excitation processes is significant. For beam energies very close to the $K^{+}$ production threshold the hyperon-proton final state interaction effects are quite important. The data is selective about the model used to describe the low energy scattering of the two final state baryons.

Revised version, to appear in Phys. Rev.C

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Cited by in corpus (42)

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• Role of baryonic resonances in the dilepton emission in nucleon-nucleon collisions
• Photoproduction of eta meson within a coupled-channels K-matrix approach
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• Influence of N*-resonances on hyperon production in the channel pp->K+ Lambda p at 2.95, 3.20 and 3.30 GeV/c beam momentum
• Dilepton production in proton-proton and quasifree proton-neutron reactions at 1.25 GeV
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Production of a cascade hyperon in the K^- - proton interaction
• Role of N*(1650) in the near threshold pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions
• Analysis of the Lambda p Final State Interaction in the Reaction p+p->K^+(Lambda p)
• Evidence for a narrow $D_{03}$ state in $K^{-}p\to \eta \Lambda$ near threshold
• ${\gamma }^{\ast }N\to N(1710)$ transition at high momentum transfer
• Eta meson production in nucleon-nucleon collisions within an effective Lagrangian model
• Reaction $\bar{p}p\to {\bar{\Lambda }}_c^{-}{\Lambda }_c^{+}$ within an effective Lagrangian model
• A relativistic two-nucleon model for $A(p,K^{+}){}_{\Lambda }B$ reaction
• Hyperon production in near threshold nucleon-nucleon collisions
• Production of ${\Lambda }_c^{+}$ hypernuclei in antiproton - nucleus collisions
• Di-Electrons from Resonances in Nucleon-Nucleon Collisions
• Exclusive $K^{+}$ production in proton-nucleus collisions
• Photoproduction of hypernuclei within the quark-meson coupling model
• A study of the $pd\to pd\eta$ reaction
• Production of cascade hypernuclei via the (K-,K+) reaction within a quark-meson coupling model
• Hypernuclear production by ($\gamma ,K^{+}$) reaction within a relativistic model
• A relativistic description of the A(pi+,K+)_ΛA reaction
• The near threshold ${\pi }^{-}p\to \eta n$ reaction in an effective Lagrangian approach
• Nucleon resonances in the ${\pi }^{-}p\to K^0\Lambda$ reaction near threshold
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• $\bar{D}D$ meson pair production in antiproton-nucleus collisions
• Strangeness Production Process $pp\to n{K}^{+}{\Sigma }^{+}$ within Resonance Model
• The $\gamma p\to n{a}_2^{+}(1320)\to n{\rho }^0{\pi }^{+}$ reactions within an effective Lagrangian approach
• Electroweak properties of kaons in a nuclear medium
• Production of the H dibaryon via the (K^-,K^+) reaction on a ${}^{12}$C target
• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model
• Production of hypernuclei with hadronic and electromagnetic probes
• Spin and Isospin Effects in the NN -> NK Lambda Reaction Near Threshold
• Pairwise final state interactions in the p d --> p d eta reaction near threshold
• ${\Xi }^{-}$ hyperon and hypernuclear production in the $(K^{-},K^{+})$ reaction on nucleon and nuclei in a field theoretical model
• Strangeness Production in pp and pn Reactions at COSY
• Nuclear Reactions at Intermediate Energies