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Title

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

AuthorsBabar Collaboration; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC; Oyanguren, Arantza CSIC ORCID; Aubert, B.
Issue Date4-Dec-2009
PublisherAmerican Physical Society
CitationPhysical Review Letters 103 (23): 231801 (2009)
AbstractA 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). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the pi pi cross section measured from threshold to 1.8 GeV is (514.1 +/- 2.2(stat)+/- 3.1(syst))x10(-10).
Publisher version (URL)http://dx.doi.org/ 10.1103/PhysRevLett.103.231801
URIhttp://hdl.handle.net/10261/21972
DOI10.1103/PhysRevLett.103.231801
ISSN0031-9007
Appears in Collections:(IFIC) Artículos

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