1. Measurement of σ(e+e−→π+π−γ) and extraction of σ(e+e−→π+π−) below 1 GeV with the KLOE detector
- Author
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L. Passalacqua, L. Tortora, F. Murtas, A. Denig, Enrico Pasqualucci, C. Forti, Alberto Aloisio, G. Finocchiaro, O. Erriquez, R. Messi, A. Passeri, R. D. Schamberger, A. Ferrari, S. Miscetti, G. Felici, F. Bossi, M. Napolitano, M. Palutan, G. Saracino, F. Perfetto, P. Gauzzi, W. Mei, E. Spiriti, M. Incagli, G. Capon, M. Barva, B. Valeriani, F. Cervelli, I. Villella, V. Bocci, T. Spadaro, M. A. Matsyuk, Fabrizio Scuri, M. Testa, J. Lee-Franzini, P. Santangelo, Massimo Antonelli, E. Santovetti, P. De Simone, R. Caloi, Barbara Sciascia, Andrea Ventura, M. Martini, Alessandra Doria, S. Giovannella, P. Valente, G. Lanfranchi, S. Di Falco, P. Branchini, M. Dreucci, S. Müller, S. Bertolucci, S. Conetti, S.A. Bulychjov, F. Nguyen, Margherita Primavera, Leonardo Merola, G. De Zorzi, F. Ambrosino, Addolorata Farilla, G. Xu, Ludovico Pontecorvo, G. Venanzoni, G. Bencivenni, M. Moulson, A. De Santis, M. L. Ferrer, S. Dell'Agnello, F. Cevenini, Francesco Lacava, C. Bloise, M. Martemianov, G. Carboni, C. Gatti, Edoardo Gorini, E. Graziani, A.L. Sibidanov, A. Di Domenico, D. Leone, G. Chiefari, C. Di Donato, P. Campana, Stefano Veneziano, P. Ciambrone, F. Ceradini, B. Di Micco, Emilio Petrolo, Vincenzo Patera, R. Versaci, Igor Sfiligoi, A. Sciubba, W. Kluge, E. De Lucia, V. Kulikov, S. Ventura, P. Franzini, T. Capussela, A. Antonelli, C. Bacci, and Cesare Bini
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Muon ,Electron–positron annihilation ,Hadron ,Form factor (quantum field theory) ,law.invention ,Nuclear physics ,Pion ,law ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Invariant mass ,Anomaly (physics) ,Nuclear Experiment ,Collider - Abstract
We have measured the cross section σ ( e + e − → π + π − γ ) at an energy W = m ϕ = 1.02 GeV with the KLOE detector at the electron–positron collider DA Φ NE . From the dependence of the cross section on the invariant mass of the two-pion system, we extract σ ( e + e − → π + π − ) for the mass range 0.35 s 0.95 GeV 2 . From this result, we calculate the pion form factor and the hadronic contribution to the muon anomaly, a μ .
- Published
- 2005
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