Please use this identifier to cite or link to this item: 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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