Photoproduction of the $\omega$ meson off the proton near threshold

Abstract

An experimental study of $\omega$ photoproduction on the proton was conducted by using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. The $\gamma p\to \omega p$ differential cross sections are measured from threshold to the incident-photon energy $E_{\gamma }=1.40$ GeV ($W=1.87$ GeV for the center-of-mass energy) with 15-MeV binning in $E_{\gamma }$ and full production-angle coverage. The quality of the present data near threshold gives access to a variety of interesting physics aspects. As an example, an estimation of the $\omega N$ scattering length ${\alpha }_{\omega p}$ is provided.

arXiv comment8 pages, 5 figures. Published version; some typos were fixed

References in corpus (19)

• Extended Partial-Wave Analysis of piN Scattering Data
• In-medium nuclear interactions of low-energy hadrons
• Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C
• Study of the gp-->etap reaction with the Crystal Ball detector at the Mainz Microtron(MAMI-C)
• Coupled-channel analysis of the $\omega$-meson production in $\pi N$ and $\gamma N$ reactions for c.m. energies up to 2 GeV
• Modification of the $\omega$-Meson Lifetime in Nuclear Matter
• Nucleon resonances in omega photoproduction
• Nuclear bound states of $\omega$ mesons
• Measurement of the Slope Parameter $\alpha$ for the $\eta \to 3{\pi }^0$ decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)
• Differential cross sections and spin density matrix elements for the reaction gamma p -> p omega
• QCD sum rules for ρ, ω, ϕmeson-nucleon scattering lengths and the mass shifts in nuclear medium
• Nucleonic resonance excitations with linearly polarized photon in $\gamma p\to \omega p$
• Effective Lagrangian approach to the omega meson photoproduction near threshold
• Scattering of vector mesons off nucleons
• Nucleon-Meson Coupling Constants and Form Factors in the Quark Model
• Measurement of the W-pair Production Cross-section and W Branching Ratios in e+e- Collisions at sqrt(s) = 161-209 GeV
• Comments on differential cross section of phi-meson photoproduction at threshold
• Experimental constraints on the $\omega$-nucleus real potential
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