Precise Measurement of the e(+)e(-)->pi(+)pi(-)(gamma) Cross Section with the Initial State Radiation Method at BABAR

• Main Authors: Cowan, Ray Franklin (Contributor), Dujmic, Denis (Contributor), Fisher, Peter H. (Contributor), Henderson, Shawn Wesley (Contributor), Sciolla, Gabriella (Contributor), Spitznagel, M. (Contributor), Yamamoto, R. K. (Contributor), Zhao, M. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2010-03-16T19:13:36Z.
• Subjects: Article
• Online Access: Get fulltext

A precise measurement of the cross section of the process e[superscript +]e[superscript -]→π[superscript +]π[superscript -](γ) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method using 232  fb[superscript -1] of data collected with the BABAR detector at e[superscript +]e[superscript -] center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process e[superscript +]e[superscript -]→μ[superscript +]μ[superscript -]γ(γ). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the ππ cross section measured from threshold to 1.8 GeV is (514.1±2.2(stat)±3.1(syst))×10[superscript -10].
Science and Technology Facilities Council, United Kingdom
MEC (Spain)
MES (Russia)
NFR (Norway)
FOM of the Netherlands
Istituto Nazionale di Fisica Nucleare of Italy
DFG (Germany)
Bundesministerium für Bildung und Forschung, Germany
CNRS-IN2P3 (France)
CEA (France)
Natural Sciences and Engineering Research Council of Canada
National Science Foundation
Department of Energy