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

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WANG Wen-Feng (for the BABAR collaboration). Precise measurement of the e+e→π+π(γ) cross section with the initial state radiation method at BABAR[J]. Chinese Physics C, 2010, 34(6): 692-697. doi: 10.1088/1674-1137/34/6/014
WANG Wen-Feng (for the BABAR collaboration). Precise measurement of the e+e→π+π(γ) cross section with the initial state radiation method at BABAR[J]. Chinese Physics C, 2010, 34(6): 692-697.  doi: 10.1088/1674-1137/34/6/014 shu
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Received: 2010-01-26
Revised: 1900-01-01
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Precise measurement of the e+e→π+π(γ) cross section with the initial state radiation method at BABAR

  • University of Notre Dame; SLAC, 2575 Sand Hill Road, Menlo Park, CA 94025, USA

Abstract: 

We present a precise BABAR measurement on the cross section of the process e+e→π+π(γ) from threshold to an energy of 3 GeV with the initial state radiation (ISR) technique, using 232 fb-1 of data collected with the BABAR detector at e+e center-of-mass energies near 10.58 GeV. The ISR luminosity is determined from a study of the leptonic process e+e-→μ+μ-γ(γ). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the
ππ cross section measured from threshold to 1.8GeV is (514.1±2.2(stat)±3.1(syst))×10-10.

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