The e+e−→P1P2γ processes close to the Φ peak: toward a model-independent analysis

We discuss the general decomposition and possible general parameterizations of the processes e+e−→γ*→P1P2γ, where P1P2 = π0π0, π0η, or π+π−, for s1/2 ≈ MΦ. Particular attention is devoted to the amplitude where the two pseudoscalar mesons are in a JCP = 0++ state, where we propose a general parameterization which should help to shed light on the nature of light scalar mesons.

[1]  J. Schechter,et al.  Chiral Approach to φ radiative decays , 2007 .

[2]  J. Schechter,et al.  Chiral approach to phi radiative decays , 2006, hep-ph/0601052.

[3]  I. Caprini,et al.  Mass and width of the lowest resonance in QCD. , 2005, Physical review letters.

[4]  A. Kiselev,et al.  Properties of the light scalar mesons face the experimental data on theϕ→π0π0γdecay and theππscattering , 2005 .

[5]  G. Pancheri,et al.  Test of FSR in the process $e^+e^-\to\pi^+\pi^-\gamma$ at DA$\Phi$NE , 2005, hep-ph/0506332.

[6]  G. Pancheri,et al.  Final-state radiation in electron-positron annihilation into a pion pair , 2004, hep-ph/0408151.

[7]  A. Polosa,et al.  A new look at scalar mesons , 2004, hep-ph/0407017.

[8]  M. Pennington,et al.  Towards a model-independent determination of the $\phi\to \gamma f_0$ coupling , 2003, hep-ph/0303200.

[9]  N. Achasov.  Radiative decays of φ meson and nature of light scalar resonances , 2002, hep-ph/0201299.

[10]  M. Casarsa,et al.  THE KLOE COLLABORATION , 2001 .

[11]  M. Pennington,et al.  Dynamical generation of scalar mesons , 2002, hep-ph/0203149.

[12]  H. Czyz,et al.  Radiative return at NLO and the measurement of the hadronic cross-section in electron–positron annihilation , 2001, hep-ph/0112184.

[13]  G. Colangelo,et al.  pi pi scattering , 2001, hep-ph/0103088.

[14]  Alan D. Martin,et al.  Review of Particle Physics: Particle data group , 2012 .

[15]  S. Burdin,et al.  Investigation of the e+e−→ωπ0→π0π0γ reaction in the energy domain near the φ-meson , 2000 .

[16]  K. Melnikov,et al.  Measuring σ(e+e−→hadrons) using tagged photons , 1999, hep-ph/9902399.

[17]  N. Achasov.  FROM THE CURRENT LITERATURE: On the nature of the a0(980) and f0(980) scalar mesons , 1998 .

[18]  N. Achasov.  On nature of scalar a 0(980) and f 0(980)-mesons , 1998, hep-ph/9803292.

[19]  N. Achasov,et al.  Interference in the reaction e+e-??p+p- and the final state interaction , 1998 .

[20]  Hayes,et al.  Review of Particle Physics. , 1996, Physical review. D, Particles and fields.

[21]  F. Close,et al.  Scalar mesons in φ radiative decay: their implications for spectroscopy and for studies of CP violation at φ factories , 1993, hep-ph/9301253.

[22]  V. Ivanchenko,et al.  On a search for four-quark states in radiative decays of φ mesons , 1989 .

[23]  E. Kuraev,et al.  On Radiative Corrections to e+ e- Single Photon Annihilation at High-Energy , 1985 .

[24]  Stanley M. Flatte,et al.  Coupled-channel analysis of the πη and KK̄ systems near KK̄ threshold , 1976 .

[25]  F. Low.  Bremsstrahlung of very low-energy quanta in elementary particle collisions , 1958 .

[26]  E. Fermi,et al.  Lectures on pions and nucleons , 1955 .

[27]  K. Watson.  Some general relations between the photoproduction and scattering of pi mesons , 1954 .