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

Graugés Pous, EugeniBABAR Collaboration2018-10-032018-10-032009-12-030031-9007https://hdl.handle.net/2445/125031A precise measurement of the cross section of the process eþe ! þ ðÞ 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 eþe center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process eþe ! þ ðÞ. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the cross section measured from threshold to 1.8 GeV is ð514:1 2:2ðstatÞ 3:1ðsystÞÞ 10 10.7 p.application/pdfeng(c) American Physical Society, 2009Partícules (Física nuclear)Mesons (Física nuclear)Particles (Nuclear physics)Mesons (Nuclear physics)Precise measurement of the e+e−→π+π−(γ) cross section with the initial state radiation method at BABARinfo:eu-repo/semantics/article5777252018-10-03info:eu-repo/semantics/openAccess