Study of omega-meson production in pp collisions at ANKE

Abstract

The production of omega-mesons in the pp->pp omega reaction has been investigated with the COSY-ANKE spectrometer for excess energies of 60 and 92MeV by detecting the two final protons and reconstructing their missing mass. The large multipion background was subtracted using an event-by-event transformation of the proton momenta between the two energies. Differential distributions and total cross sections were obtained after careful studies of possible systematic uncertainties in the overall ANKE acceptance. The results are compared with the predictions of theoretical models. Combined with data on the phi-meson, a more refined estimate is made of the Okubo-Zweig-Iizuka rule violation in the phi/omega production ratio.

arXiv comment10 pages, 9 figures, version 1, submitted to EPJ-A

References in corpus (14)

• Meson production in nucleon--nucleon collisions close to the threshold
• Nucleon-nucleon elastic scattering to 3 GeV
• $\varphi$ and $\omega$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c
• Near-Threshold Production of omega Mesons in the pp -> pp omega Reaction
• The Near-Threshold Production of Phi Mesons in pp Collisions
• Production of $\omega$ mesons in proton-proton collisions
• Precision measurement of the quasi-free pn->dphi reaction close to threshold
• 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
• Aspects of phi-meson production in proton-proton collisions
• Near-threshold $\omega$ and $\varphi$ meson productions in $pp$ collisions
• Near-threshold production of omega mesons in the pn -> d omega reaction
• Spin Physics from COSY to FAIR
• The reactions p + n --> d + omega and p + n --> d + phi near threshold

Cited by in corpus (11)

• Dilepton production in heavy-ion collisions with in-medium spectral functions of vector mesons
• The pp->K+ n Sigma+ reaction near threshold
• Systematic study of the pp -> pp omega reaction
• Exclusive production of $\omega$ meson in proton-proton collisions at high energies
• Measurement of the $\omega \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• Search for an Isospin I =3 Dibaryon
• On the sign of the pi-rho-omega coupling constant
• Omega meson production in pp collisions with a polarized beam
• Omega and Eta (Eta-prime) mesons from NN and ND collisions at intermediate energies
• Baryon-baryon and baryon-antibaryon interaction amplitudes in the spin--momentum operator expansion method
• Final state polarization of protons in $pp\to pp\omega$