Hadron production in e<sup>+</sup>e<sup>-</sup> annihilation at BABAR, and implication for the muon anomalous magnetic moment [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 539 Modern physics

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of High Energy Physics ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015

Mô tả vật lý: Size: 10 p. : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 268232

 The BABAR collaboration has an extensive program of studying hadronic cross sections in low-energy e<
 sup>
 +<
 /sup>
 e<
 sup>
 -<
 /sup>
  collisions, accessible via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for illuminating the current 3.6 sigma difference between the predicted and the experimental values. We have published results on a number of processes with two to six hadrons in the final state. We report here the results of recent studies with final states that constitute the main contribution to the hadronic cross section in the energy region between 1 and 3 GeV, as e<
 sup>
 +<
 /sup>
 e<
 sup>
 -<
 /sup>
  ? K<
 sup>
 +<
 /sup>
 K<
 sup>
 -<
 /sup>
 , ?<
 sup>
 +<
 /sup>
 ?<
 sup>
 -<
 /sup>
 , and e<
 sup>
 +<
 /sup>
 e<
 sup>
 -<
 /sup>
  ? 4 hadrons
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