Proton and deuteron mass radii from near-threshold $\varphi$-meson photoproduction

Abstract

We analyze the exclusive $\varphi$-meson photoproduction on both hydrogen and deuterium targets based on the published data of CLAS, SAPHIR and LEPS collaborations. A dipole-form scalar gravitational form factor is applied to describe the $|t|$-dependence of the differential cross section. Based on the average of all the near-threshold data from CLAS, SAPHIR and LEPS, we find that the proton and deuteron mass radii are $0.75\pm 0.02$ fm and $1.95\pm 0.19$ fm respectively. The coherent and near-threshold quarkonium photoproduction seems to be sensitive to the radius of the hadronic system. The vector-meson-dominance model together with a low-energy QCD theorem well describe the data of near-threshold $\varphi$ photoproduction on the hadronic systems.

6 pages, 6 figures

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• Diffractive $\varphi$-meson photoproduction on proton near threshold
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Cited by in corpus (7)

• Relativistic composite-particle theory of the gravitational form factors of pion: quantitative results
• First extraction of the proton mass radius and scattering length $\left|{\alpha }_{{\rho }^{0}p}\right|$ from ${\rho }^0$ photoproduction
• Analysis of the interaction between $\varphi$ meson and nucleus
• Deuteron gravitational form factors, generalized parton distributions, and charge density in the framework of the soft-wall AdS/QCD model
• The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target
• Energy-momentum tensor in QCD: nucleon mass decomposition and mechanical equilibrium
• First Extraction of the $\varphi$-${}^4\mathrm{He}$ scattering length from near-threshold $\varphi$ photoproduction on helium-4