Near-threshold $\omega$ and $\varphi$ meson productions in $pp$ collisions

Abstract

Using a relativistic effective Lagrangian at the hadronic level, near-threshold $\omega$ and $\varphi$ meson productions in proton proton ($pp$) collisions, $pp\to pp\omega /\varphi$, are studied within the distorted wave Born approximation. Both initial and final state $pp$ interactions are included. In addition to total cross section data, both $\omega$ and $\varphi$ angular distribution data are used to constrain further the model parameters. For the $pp\to pp\omega$ reaction we consider two different possibilities: with and without the inclusion of nucleon resonances. The nucleon resonances are included in a way to be consistent with the ${\pi }^{-}p\to \omega n$ reaction. It is shown that the inclusion of nucleon resonances can describe the data better overall than without their inclusion. However, the SATURNE data in the range of excess energies $Q<31$ MeV are still underestimated by about a factor of two. As for the $pp\to pp\varphi$ reaction it is found that the presently limited available data from DISTO can be reproduced by four sets of values for the vector and tensor $\varphi NN$ coupling constants. Further measurements of the energy dependence of the total cross section near threshold energies should help to constrain better the $\varphi NN$ coupling constant.

Latex, 37 pages, 13 figures (14 EPS-figure files), text modified, version to appear in Phys. ReV. C

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Cited by in corpus (28)

• Kaon production in heavy ion reactions at intermediate energies
• Meson production in nucleon--nucleon collisions close to the threshold
• The role of $N^{\ast }(1535)$ in $pp\to pp\varphi$ and ${\pi }^{-}p\to n\varphi$ reactions
• Di-Electron Bremsstrahlung in Intermediate-Energy pn and Dp Collisions
• The Near-Threshold Production of Phi Mesons in pp Collisions
• Combined Analysis of Near-Threshold Production of omega and phi Mesons in Nucleon-Nucleon Collisions within an Effective Meson-Nucleon Model
• Determination of the ${\Theta }^{+}$ parity from $\gamma n\to K^{-}{K}^{+}n$
• The production of K+K- pairs in proton-proton collisions at 2.83 GeV
• Evidence of N*(1535) resonance contribution in the pn->dϕreaction
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• Omega Production in pp Collisions
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• Omega meson production in pp collisions with a polarized beam
• Non-Strange Meson Production with Hadronic Probes
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