Precise measurement of the e[superscript +]e[superscript -]→π[superscript +]π[superscript -](γ) cross section with the initial-state radiation method at BABAR
Name
Lees-2012-cross section with the initial-state radiation method at BABAR.pdf
Size
4.09 MB
Format
Adobe PDF
Checksum (MD5)
44be0a02ca4ca55ba7ec77746dfdf12b
Author(s)
Sciolla, Gabriella
Dujmic, Denis
Cowan, Ray F
Date Issued
August 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. et al. “Precise measurement of the e[superscript +]e[superscript -]→π[superscript +]π[superscript -](γ) cross section with the initial-state radiation method at BABAR.” Physical Review D 86.3 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
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)γISR, which is found to agree with the next-to-leading-order QED prediction to within 1.1%. The cross section for the process e[superscript +]e[superscript -]→π[superscript +]π[superscript -](γ) is obtained with a systematic uncertainty of 0.5% in the dominant ρ resonance region. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the measured ππ cross section from threshold to 1.8 GeV is (514.1±2.2(stat)±3.1(syst))×10[superscript -10].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.032013
