Measurement Of Sigma(E(+)E(-) -> Pi(+)Pi(-)) Using The Radiative Return With The Kloe Detector

A Aloisio,F Ambrosino,A Antonelli,M Antonelli, C Bacci, M Barva, G Bencivenni,S Bertolucci, C Bini, C Bloise,V Bocci, F Bossi, P Branchini,Sa Bulychjov, R Caloi, P Campana, G Capon,T Capussela,G Carboni, F Ceradini,F Cervelli,F Cevenini, G Chiefari,P Ciambrone,S Conetti,E De Lucia,A De Santis,R De Simone,G De Zorzi,S Dell'Agnello, A Denig,A Di Domenico,C Di Donato,S Di Falco,B Di Micco,A Doria,M Dreucci, O Erriquez, A Farilla,G Felici,A Ferrari,Ml Ferrer, G Finocchiaro,C Forti, P Franzini, C Gatti,P Gauzzi,S Giovannella,E Gorini,E Graziani, M Incagli,W Kluge,V Kulikov,F Lacava, G Lanfranchi, J Lee-Franzini, D Leone,F Lu, M Martemianov,M Martini,M Matsyuk,W Mei,L Merola,R Messi,S Miscetti, M Moulson,S Muller,F Murtas,M Napolitano,F Nguyen, M Palutan,E Pasqualucci,L Passalacqua, A Passeri,V Patera,F Perfetto, E Petrolo,L Pontecorvo,M Primavera,P Santangelo,E Santovetti,G Saracino,Rd Schamberger,B Sciascia, A Sciubba, F Scuri,I Sfiligoi, A Sibidanov,T Spadaro,E Spiriti,M Testa,L Tortora,P Valente,B Valeriani,G Venanzoni,S Veneziano,A Ventura, R Versaci, I Villella,G Xu

ICHEP 2005: PROCEEDINGS OF THE 32ND INTERNATIONAL CONFERENCE HIGH ENERGY PHYSICS VOLS 1 AND 2（2005）

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摘要

We have measured the cross section sigma(e(+)e(-) -> pi(+)pi(-gamma)) at an energy W = m(phi) = 1.02 GeV with the KLOE detector at the electron-positron collider DA Phi NE. From the dependence of the cross section on the invariant mass of the two-pion system, we extract sigma(e(+)e(-) -> pi(+)pi(-)) for the mass range 0.35 < s < 0.95 GeV2. From this result, we calculate the hadronic contribution to the muon anomaly a(mu).

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cross section

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