Measurement of the e+e−→π+π− cross section between 600 and 900 MeV using initial state radiation
Journal Article
·
· Physics Letters B
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. In conclusion, we find this value to be aπμπ,LO (600–900 MeV) = (368.2 ±2.5stat±3.3sys) ·10-10, which is between the corresponding values using the BaBar or KLOE data.
- Research Organization:
- Indiana Univ., Bloomington, IN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-04ER41291; FG02-05ER41374; FG02-94ER40823; DESC0010118; FG02- 94ER40823; SC0010118
- OSTI ID:
- 1227233
- Alternate ID(s):
- OSTI ID: 1242353
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Vol. 753 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Cited by: 158 works
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