Determination of σ(e+e–→ π+ π–) from radiative processes at DAΦNE

2003/07/18 by The KLOE Collaboration, F. Ambrosino, A. Aloisio +98 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1140/epjcd/s2004-03-1613-4

published as Eur.Phys.J.C33:s656-s658,2004 · Contributed paper to EPS 2003 and LP 2003

arxiv created 2003/07/18 · openalex publication_date 2004/02/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29

Abstract

We have measured the cross section σ(e⁺e^-→π⁺π^-γ) with the KLOE detector at DAΦNE, at an energy W=M_ϕ=1.02 GeV. From the dependence of the cross section on m(π⁺π^-)=√(W²-2WE_γ), where E_γ is the energy of the photon radiated from the initial state, we extract σ(e⁺e^-→π⁺π^-) for the mass range 0.35<m²(π⁺π^-)<0.95 GeV². From our result we extract the pion form factor and the hadronic contribution to the muon anomaly, a_μ.

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