Measurement of the e [superscript +] e [superscript −] → π [superscript +] π [superscript −] π [superscript 0] π [superscript 0] cross section using initial-state radiation at BABAR
Name
PhysRevD.96.092009.pdf
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1.16 MB
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Checksum (MD5)
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Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Brown, D. N.
Kolomensky, Yu. G.
Fritsch, M.
Koch, H.
Date Issued
November 2017
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., et al. “Measurement of the e[superscript +] e [superscript −] → π [superscript +] π [superscript −] π [superscript 0] π [superscript 0] Cross Section Using Initial-State Radiation at BABAR.” Physical Review D, vol. 96, no. 9, Nov. 2017. © 2017 American Physical Society
Version
Final published version
Abstract
The process e [superscript +] e [superscript -] →π [superscript +] π [superscript -] 2π [superscript 0] γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3 fb [superscript -1] of data collected around a center-of-mass energy of √s =10.58 GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel’s contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (g[subscript μ][superscript π[superscript +]π[superscript -]2π[superscript 0]]-2)/2=(17.9±0.1[subscript stat]±0.6[subscript syst])×10[superscript -10] in the energy range 0.85 GeV
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.96.092009
