Abstract

Using data consisting of 2.93 fb-1 integrated luminosity at the centre of mass energy √s = 3773 MeV, recorded with the BESIII detector at BEPCII, the cross section and form factor |Fπ|2 was extracted in the energy range 600-900 MeV, using the method of radiative return. The cross section is used as input to calculate the leading-order vacuum polarisation contribution of the e+e-→π+π- channel to (g - 2)μ as aμ ππ,LO(600 — 900 MeV) = (368.2±2.5stat ±3.3sys) • 10-10. This result is compatible with corresponding values using KLOE data, but disagrees whit BaBar. The ongoing search for e+e-→ηc at BESIII is also discussed.

Details

Title
Meson form factors and P→γγ physics at BESIII
Author
Pettersson, J 1 

 Department of Physics and Astronomy, Uppsala University, Box 516, Sweden 
Publication year
2016
Publication date
Aug 2016
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2575189595
Copyright
© 2016. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.