%0 Journal Article
%T Precise measurement of the e(+)e(-) -> pi(+)pi(-)(gamma) cross section with the initial-state radiation method at BABAR
%A BABAR Collaboration (Lees, J. P. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%J Physical Review D
%D 2012
%V 86
%N 3
%I Amer Physical Soc
%@ 1550-7998
%G English
%F BABARCollaborationLees_etal2012
%O WOS:000308008300001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1135), last updated on Thu, 27 Sep 2012 11:20:44 +0000
%X A precise measurement of the cross section of the process e(+)e(-) -> pi(+)pi(-) (gamma) from threshold to an energy of 3 GeV is obtained with the initial-state radiation (ISR) method using 232 fb(-1) of data collected with the BABAR detector at e(+)e(-) center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process e(+)e(-) -> mu(+)mu(-) (gamma)gamma(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(-) -> 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 1.8 GeV is (514.1 +/- 2.2(stat) +/- 3.1(sys)) x 10(-10).
%R 10.1103/PhysRevD.86.032013
%U http://arxiv.org/abs/1205.2228
%U https://doi.org/10.1103/PhysRevD.86.032013
%P 032013-49pp