Upper limit for the cross section of the overlapping scalar resonances f0(980) and a0(980) produced in proton-proton collisions in the range of the reaction threshold

Abstract

Utilizing a missing mass technique we investigate the pp --> ppX reaction scanning beam energies in the range permitting to create a mass close to that of the f0(980) and a0(980) scalar resonances, but still below the K^+K^- threshold where they decay dominantly into pi pi and pi eta mesons, respectively. Prior to the data analysis we introduce a notion of the close to threshold total cross section for broad resonances. We estimated for the overlapping mesons a0 and f0 the total cross section to be smaller than 430 nb at excess energy of Q = 5 MeV. The experiment have been performed at the Cooler Synchrotron COSY using the COSY-11 facility.

arXiv comment11 pages, 6 figures, submitted to J. Phys. G: Nucl. Phys

References in corpus (22)

• Meson-Meson interaction in a non-perturbative chiral approach
• Experimental evidence for a light and broad scalar resonance in $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay
• Study of the $D_s^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay and measurement of $f_0$ masses and widths
• Study of the $\varphi$ decays into ${\pi }^0{\pi }^0\gamma$ and $\eta {\pi }^0\gamma$ final states
• J/Ψ\to ϕππ(K \bar{K}) decays, chiral dynamcis and OZI violation
• A coupled channel analysis of the centrally produced K+K- and pi+pi- final states in pp interactions at 450 GeV/c
• Close-to-threshold Meson Production in Hadronic Interactions
• Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction
• Properties of the a0(980) meson
• S-wave eta'-proton FSI; phenomenological analysis of near-threshold production of pi0, eta, and eta' mesons in proton-proton collisions
• Three channel model of meson-meson scattering and scalar meson spectroscopy
• Meson-meson scattering: $K\overline{K}$-thresholds and $f_0(980)-a_0(980)$ mixing
• Near Threshold K+K- Meson-Pair Production in Proton-Proton Collisions
• Identifying the quark content of the isoscalar scalar mesons f_0(980), f_0(1370), and f_0(1500) from weak and electromagnetic processes
• First observation of the $\varphi \to {\pi }^{+}{\pi }^{-}\gamma$ decay
• Production of f_0(980), f_2(1270) and ϕ(1020) in hadronic Z^0 decay
• A partial wave analysis of the centrally produced pi0pi0 system in pp interactions at 450 GeV/c
• Photon and Light Meson Production in Hadronic Z^0 Decays
• K${}^{-}$ Meson Production in the Proton-Proton Reaction at 3.67 GeV/c
• Monitoring of the accelerator beam distributions for internal target facilities
• On the possibility of $f_0$ observation in low energy $pp$ collisions
• On momentum dependence of the reaction ${\pi }^{-}p\to \omega n$ near threshold

Cited by in corpus (6)

• Meson production in nucleon--nucleon collisions close to the threshold
• A method to disentangle single- and multi-meson production in missing mass spectra from quasi-free pn --> pn X reactions
• Few-body aspects of the near threshold pseudoscalar meson production
• Combined analysis of the $K^{+}{K}^{-}$ interaction using near threshold $pp\to pp{K}^{+}{K}^{-}$ data
• Strangeness Production in pp and pn Reactions at COSY
• Reaction pp -> pp πππas a background for hadronic decays of the eta-prime meson