KLOE ppg 2010 web page

Measurement of sigma(e+ e- -> pi+ pi-) from threshold to 0.85 GeV^2 using Initial State Radiation with the KLOE detector. By KLOE Collaboration (F. Ambrosino et al.). June 2010. 17pp. Published in Phys.Lett.B700:102-110,2011 e-Print Archive: arXiv:hep-ex/1006.5313 [abstract] [ps] [pdf]

Data files for the values given in Table 1:

  • [sppg10.dat]. $d\sigma(e^+e^- \to \pi^+\pi^-\gamma)/dM^2_{\pi\pi}$ with $0^o<\theta_{\pi}<180^o$ and at least one photon with $50^o<\theta_{\gamma}<130^o$ and $E_\gamma$ > 20 MeV. [README]

  • [spp10.dat]. Bare cross section $\sigma(e^+e^- \to \pi^+\pi^-)$, which includes FSR and excludes VP. [README]

  • [fpi10.dat]. Pion form factor $|F+\pi|^2$ including VP, but with FSR removed. [README]

    • Statistical errors:

    (Note: While the errors given in the datafiles above have been rounded accordingly, this is not the case for the values in the covariance matrices given below)

  • [covsppg10.dat]. Covariance matrix for $d\sigma(e^+e^- \to \pi^+\pi^-\gamma)/dM^2_{\pi\pi}$ with $0^o<\theta_{\pi}<180^o$ and at least one photon with $50^o<\theta_{\gamma}<130^o$ and $E_\gamma$ > 20 MeV. [README]

  • [icovsppg10.dat]. Inverse covariance matrix for $d\sigma(e^+e^- \to \pi^+\pi^-\gamma)/dM^2_{\pi\pi}$ with $0^o<\theta_{\pi}<180^o$ and at least one photon with $50^o<\theta_{\gamma}<130^o$ and $E_\gamma$ > 20 MeV. [README]

  • [covspp10.dat]. Covariance matrix for $\sigma(e^+e^- \to \pi^+\pi^-)$. [README]

  • [icovspp10.dat]. Inverse covariance matrix for $\sigma(e^+e^- \to \pi^+\pi^-)$. [README]

  • [covfpi10.dat]. Covariance matrix for the pion form factor. [README]

  • [icovfpi10.dat]. Inverse covariance matrix for the pion form factor. [README]

    • Systematic errors:

    Coming soon...
    (in the meantime, you can contact S.Mueller(at)kvi.nl or use the information provided in Table 6 of the additional documentation below).

    Additional documentation:

    Measurement of sigma(e+e- --> pi+ pi-) for M_pipi^2 between 0.1 and 0.85 GeV^2 using the Initial State Radiation method with the KLOE detector. KLOE Note Nr. 225 June 2011, 77 pp.
    [ps] [pdf]

    07 June 2011 S.M.