TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
PY  - 2012
DA  - 2012//
TI  - Precise measurement of the e(+)e(-) -> pi(+)pi(-)(gamma) cross section with the initial-state radiation method at BABAR
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 032013
EP  - 49pp
VL  - 86
IS  - 3
PB  - Amer Physical Soc
AB  - 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).
SN  - 1550-7998
UR  - http://arxiv.org/abs/1205.2228
UR  - https://doi.org/10.1103/PhysRevD.86.032013
DO  - 10.1103/PhysRevD.86.032013
LA  - English
N1  - WOS:000308008300001
ID  - BABARCollaborationLees_etal2012
ER  -