The e+ e- -> P1 P2 gamma processes close to the Phi peak: toward a model-independent analysis

Abstract

We discuss the general decomposition and possible general parameterizations of the processes $e^{+}{e}^{-}\to {\gamma }^{\ast }\to P_1{P}_2\gamma$, where $P_1{P}_2={\pi }^0{\pi }^0$, ${\pi }^0\eta$, or ${\pi }^{+}{\pi }^{-}$, for $\sqrt{s}\approx M_{\Phi }$. Particular attention is devoted to the amplitude where the two pseudoscalar mesons are in a $J^{CP}=0^{++}$ state, where we propose a general parameterization which should help to shed light on the nature of light scalar mesons.

12 pages, Latex

References in corpus (21)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• ππscattering
• Mass and width of the lowest resonance in QCD
• A new look at scalar mesons
• Scalar Mesons in $\varphi$ Radiative Decay: their implications for spectroscopy and for studies of CP-violation at $\varphi$ factories
• Measuring sigma(e^+e^- \to hadrons) using tagged photon
• Radiative return at NLO and the measurement of the hadronic cross-section in electron-positron annihilation
• Study of the Decay phi --> pi0 pi0 gamma with the KLOE Detector
• Dynamical Generation of Scalar Mesons
• Analysis of the nature of the $\varphi \to \gamma \pi \eta$ and $\varphi \to \gamma {\pi }^0{\pi }^0$ decays
• Analysis of the nature of the $\varphi \to \gamma \pi \eta$ and $\varphi \to \gamma {\pi }^0{\pi }^0$ decays
• Properties of the light scalar mesons face the experimental data on the $\varphi \to {\pi }^0{\pi }^0\gamma$ decay and the $\pi \pi$ scattering
• Study of the decay phi--> f0(980)g --> pi+pi-g with the KLOE detector
• Radiative decays of ϕ-meson and nature of light scalar resonances
• On the Nature of the Scalar a_0(980) and f_0(980)-Mesons
• Interference in the reaction $e^{+}{e}^{-}\to \gamma {\pi }^{+}{\pi }^{-}$ and the final state interaction
• Investigation of the $e^{+}{e}^{-}\to \omega {\pi }^0\to {\pi }^0{\pi }^0\gamma$ reaction in the energy domain near the $\varphi$-meson
• Final-sate radiation in electron-positron annihilation into a pion pair
• Towards a model independent determination of the phi -> f_0 - gamma coupling
• Chiral approach to phi radiative decays
• Radiative decays of phi-meson about nature of light scalar resonances

Cited by in corpus (25)

• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• A Theory of Scalar Mesons
• Dalitz plot analysis of e+ e- --> pi0 pi0 gamma events at SQRT(s) ~ M(phi) with the KLOE detector
• Study of the a_0(980) meson via the radiative decay phi->eta pi^0 gamma with the KLOE detector
• Theoretical analysis of the $\gamma \gamma \to {\pi }^0\eta$ process
• What can we learn about light-meson interactions at electron-positron colliders?
• Decay of light scalar mesons into vector-photon and into pseudoscalar mesons
• Photoproduction of $a_0(980)$ and $f_0(980)$
• Towards an understanding of the light scalar mesons
• Scalar and vector meson exchange in V->P0P0gamma decays
• The Physics of DAFNE and KLOE
• Radiative $\varphi$ decays with derivative interactions
• Test of FSR in the process $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma$ at DA$\Phi$NE and extraction of the pion form factor at threshold
• Final state radiation and a possibility to test a pion-photon interaction model near two-pion threshold
• e+e- annihilation to (pi0 pi0 gamma) and (pi0 eta gamma) as a source of information on scalar and vector mesons
• FASTERD: a Monte Carlo event generator for the study of final state radiation in the process $e^{+}{e}^{-}\to \pi \pi \gamma$ at DA$\Phi$NE
• The phi->K0K0gamma decay
• Asymmetry observables in e+ e- --> pi+ pi- gamma in the phi region within a chiral unitary approach
• Charge asymmetries in e+e- -> pi+ pi- gamma at the phi resonance
• Contribution of exclusive $({\pi }^0{\pi }^0,{\pi }^0\eta ,\eta \eta )\gamma$ channels to the leading order HVP of the muon $g-2$
• Theoretical studies of the reaction e+ e- --> K+ K- gamma
• Latest studies on the reaction e+ e- --> K + K- gamma
• Structure-dependent radiative corrections to $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma$ in the GVMD approach
• Strong interaction between kaons in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma
• Near threshold kaon-kaon interaction in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma