ISSN 0253-2778

CN 34-1054/N

Open AccessOpen Access JUSTC

BESIII π+π- form factor measurement and perspective of π+π-π0

Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2016.04.007
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  • Author Bio:

    WANG Yaqian, male, born in 1984, PhD. Research field: particle physics. E-mail:whyaqm@gmail.com

  • Received Date: 30 November 2015
  • Rev Recd Date: 20 April 2016
  • Publish Date: 30 April 2016
  • The cross section is measured of e+e-→π+π- in the energy range between 600 and 900 MeV/c2 with a 2.93 fb-1 data set taken at the center-of-mass energy 3773 GeV at BESIII. The initial state radiation technique is used, and the total systematic uncertainty is estimated to be 09%. The squared form factor |Fπ|2 is extracted, and comparisons are made with results from both KLOE and BaBar. The two-pion contribution to the hadronic vacuum polarization contribution to (g-2)μ is calculated to be aππ,LOμ(600~900 MeV/c2)=(3682±25stat±33sys)×10-10.
    The cross section is measured of e+e-→π+π- in the energy range between 600 and 900 MeV/c2 with a 2.93 fb-1 data set taken at the center-of-mass energy 3773 GeV at BESIII. The initial state radiation technique is used, and the total systematic uncertainty is estimated to be 09%. The squared form factor |Fπ|2 is extracted, and comparisons are made with results from both KLOE and BaBar. The two-pion contribution to the hadronic vacuum polarization contribution to (g-2)μ is calculated to be aππ,LOμ(600~900 MeV/c2)=(3682±25stat±33sys)×10-10.
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