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Measurement of the e+e−→π+π− Cross Secti...
Ablikim, M....
Measurement of the e+e−→π+π− Cross Section between 600 and 900 MeV Using Initial State Radiation by Ablikim, M. ( Author )
N.A
29-07-2015
We extract the e+e−→π+π− cross section in the energy range between 600 and 900 MeV, exploiting the method of initial state radiation. A data set with an integrated luminosity of 2.93 fb−1 taken at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider is used. The cross section is measured with a systematic uncertainty of 0.9%. We extract the pion form factor |Fπ|2 as well as the contribution of the measured cross section to the leading order hadronic vacuum polarization contribution to (g−2)μ. We find this value to be aππ,LOμ(600−900MeV)=(368.2±2.5stat±3.3sys)⋅10−10.
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Article
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36.88 KB
English
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MYR 0.00
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https://arxiv.org/abs/1507.08188
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