Comparison of Isoscalar Vector Meson Production Cross Sections in Proton-Proton Collisions

Abstract

The reaction $pp\to pp\omega$ was investigated with the TOF spectrometer, which is an external experiment at the accelerator COSY (Forschungszentrum Jülich, Germany). Total as well as differential cross sections were determined at an excess energy of $93MeV$ ($p_{beam}=2950MeV/c$). Using the total cross section of $(9.0\pm 0.7\pm 1.1)\mu b$ for the reaction $pp\to pp\omega$ determined here and existing data for the reaction $pp\to pp\varphi$, the ratio ${\mathcal{R}}_{\varphi /\omega }={\sigma }_{\varphi }/{\sigma }_{\omega }$ turns out to be significantly larger than expected by the Okubo-Zweig-Iizuka (OZI) rule. The uncertainty of this ratio is considerably smaller than in previous determinations. The differential distributions show that the $\omega$ production is still dominated by S-wave production at this excess energy, however higher partial waves clearly contribute. A comparison of the measured angular distributions for $\omega$ production to published distributions for $\varphi$ production at $83MeV$ shows that the data are consistent with an identical production mechanism for both vector mesons.

References in corpus (14)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Meson production in nucleon--nucleon collisions close to the threshold
• $\varphi$ and $\omega$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c
• On the treatment of $NN$ interaction effects in meson production in $NN$ collisions
• The Near-Threshold Production of Phi Mesons in pp Collisions
• Near-Threshold Production of omega Mesons in the pp -> pp omega Reaction
• Production of $\omega$ mesons in proton-proton collisions
• Production of $\omega$-mesons in proton-proton collisions
• Combined Analysis of Near-Threshold Production of omega and phi Mesons in Nucleon-Nucleon Collisions within an Effective Meson-Nucleon Model
• Off-shell omega production in proton-proton collisions near threshold
• Near-threshold $\omega$ and $\varphi$ meson productions in $pp$ collisions
• On the current status of OZI violation in $\pi N$ and pp reactions
• Vector meson angular distributions in proton-proton collisions
• Exclusive $\varphi$ production in proton-proton collisions in the resonance model

Cited by in corpus (11)

• Dielectron production in Ar+KCl collisions at 1.76A GeV
• Energy and system size dependence of ϕmeson production in Cu+Cu and Au+Au collisions
• Dilepton production in proton-induced reactions at SIS energies with the GiBUU transport model
• Production of Lambda and Sigma^0 hyperons in proton-proton collisions
• Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy
• Systematic study of the pp -> pp omega reaction
• Exclusive production of $\omega$ meson in proton-proton collisions at high energies
• The pK0Σ+ final state in proton-proton collisions
• Spin alignment and violation of the OZI rule in exclusive $\omega$ and $\varphi$ production in pp collisions
• Strangeness Production at COSY
• Baryon-baryon and baryon-antibaryon interaction amplitudes in the spin--momentum operator expansion method