Details

Autor(en) / Beteiligte

• Tisserand, V.
• Grauges, E.
• Palano, A.
• Eigen, G.
• Stugu, B.
• Brown, D. N.
• Kerth, L. T.
• Lynch, G.
• Druzhinin, V. P.
• Onuchin, A. P.
• Serednyakov, S. I.
• Gary, J. W.
• Vitug, G. M.
• Richman, J. D.
• Echenard, B.
• Porter, F. C.
• Rakitin, A. Y.
• Sun, L.
• Nauenberg, U.
• Ayad, R.
• Toki, W. H.
• Bernard, D.
• Clark, P. J.
• Cibinetto, G.
• Garzia, I.
• Negrini, M.
• Finocchiaro, G.
• Patteri, P.
• Piccolo, M.
• Contri, R.
• Monge, M. R.
• Passaggio, S.
• Bhuyan, B.
• Prasad, V.
• Morii, M.
• Uwer, U.
• Behera, P. K.
• Mallik, U.
• Chen, C.
• Cochran, J.
• Prell, S.
• Arnaud, N.
• Grosdidier, G.
• Le Diberder, F.
• Stocchi, A.
• Payne, D. J.
• Bevan, A. J.
• Sacco, R.
• Griessinger, K.
• Hafner, A.
• Barlow, R. J.
• Hamilton, B.
• Robertson, S. H.
• Biassoni, P.
• Palombo, F.
• Stracka, S.
• Cremaldi, L.
• Sciacca, C.
• Martinelli, M.
• LoSecco, J. M.
• Wang, W. F.
• Strom, D.
• Torrence, E.
• Gagliardi, N.
• Margoni, M.
• Rotondo, M.
• Bomben, M.
• Ocariz, J.
• Pacetti, S.
• Bettarini, S.
• Cervelli, A.
• Giorgi, M. A.
• Li Gioi, L.
• Mazzoni, M. A.
• Piredda, G.
• Leddig, T.
• Schröder, H.
• Wilson, F. F.
• Vasseur, G.
• Benitez, J. F.
• Cartaro, C.
• Dubois-Felsmann, G. P.
• Ebert, M.
• Fulsom, B. G.
• Hast, C.
• Va’vra, J.
• Wright, D. H.
• Park, W.
• Wilson, J. R.
• Bellis, M.
• Miyashita, T. S.
• Alam, M. S.
• Peimer, D. R.
• Schwitters, R. F.
• Wray, B. C.
• Banerjee, Sw
• Choi, H. H. F.
• Roney, J. M.
• Gershon, T. J.
• Prepost, R.

Titel

Precise measurement of the e + e − → π + π − ( γ ) cross section with the initial-state radiation method at BABAR

Ist Teil von

• Physical review. D, 2012-08, Vol.86 (3), Article 032013

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2012

Quelle

American Physical Society [PROLA]

Beschreibungen/Notizen

• A precise measurement of the cross section of the process $e^+e^-\to\pi^+\pi^-(\gamma)$ from threshold to an energy of 3GeV is obtained with the initial-state radiation (ISR) method using $232\invfb$ of data collected with the BaBar detector at $e^+e^-$ center-of-mass energies near 10.6GeV. The ISR luminosity is determined from a study of the leptonic process $e^+e^-\to\mu^+\mu^-(\gamma)\gamma_{\rm ISR}$, which is found to agree with the next-to-leading-order QED prediction to within 1.1%. The cross section for the process $e^+e^-\to\pi^+\pi^-(\gamma)$ is obtained with a systematic uncertainty of 0.5% in the dominant $\rho$ resonance region. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the measured $\pi\pi$ cross section from threshold to 1.8GeV is $(514.1 \pm 2.2({\rm stat}) \pm 3.1({\rm syst}))\times 10^{-10}$.