KLOE extraction of a_μ^ππ in the mass range [0.35,0.95] GeV²

2007/07/27 by The KLOE Collaboration
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.0707.4078

Contributed paper to Lepton Photon 2007

arxiv created 2007/07/27 · openalex publication_date 2007/07/27 · arxiv updated 2012/08/27 · openalex created_date 2022/09/30 · openalex updated_date 2026/07/28

Abstract

The KLOE Experiment at the ϕ factory DAΦNE, has measured the cross section σ(e⁺e^-→π⁺π^-γ) using two different selection schemes: requiring the photon emission at small polar angle and detecting the photon at large polar angle in the calorimeter. Using a theoretical radiator function we extract the pion form factor and obtain the ππ contribution to the anomalous magnetic moment of the muon. Results presented here come from the analysis of 240 pb^-1 collected in 2002, with improved systematic uncertainty with respect to the published KLOE analysis. We also include an update of the previous analysis.

Related

• Hadronic cross section measurements and contribution to (g-2)_μ with KLOE
• Combination of KLOE σ(e⁺e^-→π⁺π^-γ(γ)) measurements and determination of a_μ^π+π- in the energy range 0.10 < s < 0.95 GeV²
• Measurement of the hadronic cross section at DAPHNE with the KLOE detector
• On the inclusion of the pion form factor in e⁺e^- → π⁺π^- beyond leading order
• Measuring the Hadronic Cross Section at KLOE using the Radiative Return