Measurement of [formula omitted] from threshold to 0.85 GeV2 using initial state radiation with the KLOE detector

F Ambrosino,F Ceradini,C Taccini,S Meola,B Di Micco,P Gauzzi,G Felici,S Fiore,V Patera,T Capussela,C Gatti,G De Zorzi,P Franzini,P Santangelo,P Beltrame,M Dreucci,E De Lucia,D Leone,F Nguyen,A De Santis,E Graziani,S Miscetti,C Bini,R Versaci,S Giovannella,A Denig,M Jacewicz,A Di Domenico,F Murtas,F Archilli,G Capon,L Tortora,S Müller,G Venanzoni,P Branchini,P Ciambrone,M Napolitano,F Bossi,C Di Donato,G Bencivenni,W Kluge,C Bloise,A Passeri,P Massarotti,P De Simone,S S Bocchetta ,J Lee‐Franzini

doi:10.1016/j.physletb.2011.04.055

Measurement of [formula omitted] from threshold to 0.85 GeV2 using initial state radiation with the KLOE detector

F Ambrosino, F Ceradini + Show 45 more

Open Access

https://doi.org/10.1016/j.physletb.2011.04.055

Copy DOI

Journal: Physics Letters B	Publication Date: Apr 29, 2011
Citations: 158	License type: cc-by

Affiliation: INFN Sezione di Napoli, University of Naples Federico II, INFN Sezione di Roma III, Roma Tre University, National Laboratory of Frascati, Johannes Gutenberg University Mainz, INFN Sezione di Roma I, Sapienza University of Rome, INFN Sezione di Roma II, University of Rome Tor Vergata, Karlsruhe Institute of Technology, Stony Brook University, State University of New York

#Initial State Radiation #Pion Form Factor + Show 8 more

Abstract
Full-Text PDF
Similar Papers

Abstract

We have measured the cross section of the radiative process e+e−→π+π−γ with the KLOE detector at the Frascati ϕ-factory DAΦNE, from events taken at a CM energy W=1 GeV. Initial state radiation allows us to obtain the cross section for e+e−→π+π−, the pion form factor |Fπ|2 and the dipion contribution to the muon magnetic moment anomaly, Δaμππ=(478.5±2.0stat±5.0syst±4.5th)×10−10 in the range 0.1<Mππ2<0.85 GeV2, where the theoretical error includes a SU(3) χPT estimate of the uncertainty on photon radiation from the final pions. The discrepancy between the Standard Model evaluation of aμ and the value measured by the Muon g-2 collaboration at BNL is confirmed.

Full Text