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http://hdl.handle.net/2307/337| Title: | Measurement of sigma(e+ e- -> pi+ pi- gamma) and the di-pion contribution to the muon anomaly with the KLOE detector | Authors: | Ambrosino, F. Antonelli, A. Antonelli, M. Archilli, F. Bacci, Cesare Beltrame, P. Bencivenni, G. Bertolucci, S. Bini, C. Bloise, C. Bocchetta, S. Bossi, F. Branchini, P. Campana, P. Capon, G. Capussela, T. Ceradini, Filippo Chi, S. Chiefari, G. Ciambrone, P. Crucianelli, F. De Lucia, E. De Santis, A. De Simone, P. De Zorzi, G. Denig, A. Di Domenico, A. Di Donato, C. Di Falco, S. Di Micco, Biagio Doria, A. Dreucci, M. Felici, G. Ferrari, A. Ferrer, M. L. Fiore, S. Forti, C. Franzini, P. Gatti, C. Gauzzi, P. Giovannella, S. Gorini, E. Graziani, E. Incagli, M. Kluge, W. Kulikov, V. Lacava, F. Lanfranchi, G. Lee-Franzini, J. Leone, D. Martemianov, M. Martini, M. Massarotti, P. Mei, W. Meola, S. Miscetti, S. Moulson, M. Mueller, S. Murtas, F. Napolitanoe, M. Nguyen, Federico Palutan, M. Pasqualucci, E. Passeri, A. Patera, V. Perfetto, F. Primavera, M. Santangelo, P. Saracino, G. Sciascia, B. Sciubba, A. Sibidanov, A. Spadaro, T. Testa, M. Tortora, L. Valente, P. Valeriani, B. Venanzoni, G. Versaci, R. Xu, G. |
Keywords: | e+e− annihilation hadron cross section π-meson form factor muon magnetic moment |
Issue Date: | Jan-2009 | Publisher: | Elsevier Science BV | Source: | 24 | Abstract: | We have measured the cross section sigma(e+ e- -> pi+ pi- gamma) at DAFNE, the Frascati phi-factory, using events with initial state radiation photons emitted at small angle andinclusive of final state radiation. We present the analysis of a newdata set corresponding to an integrated luminosity of 240 pb(-1). Wehave achieved a reduced systematic uncertainty with respect topreviously published KLOE results. From the cross section we obtain thepion form factor and the contribution to the muon magnetic anomaly fromtwo-pion states in the mass range 0.592 < M pi pi < 0.975 GeV. For the latter we find Delta(pi pi)_a(mu) = (387.2 +/- 0.5(stat) +/- 2.4(exp)+/- 2.3(th)) x 10^(-10). | URI: | http://hdl.handle.net/2307/337 | ISSN: | 0370-2693 | DOI: | 10.1016/j.physletb.2008.10.060 |
| Appears in Collections: | A - Articolo su rivista X_Dipartimento di Fisica 'Edoardo Amaldi' |
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