6533b834fe1ef96bd129d4d2
RESEARCH PRODUCT
Pion Form Factor at BESIII
Y. Wangsubject
Systematic errorPhysicsNuclear and High Energy PhysicsParticle physicsRange (particle radiation)010308 nuclear & particles physicsHadronForm factor (quantum field theory)Radiation01 natural sciencesNuclear physicsPion0103 physical sciencesVacuum polarization010306 general physicsdescription
Abstract At BESIII, we measured the cross section 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 3.773 GeV. The initial state radiation technique is used, and the total systematic uncertainty is estimated to be 0.9%. The squared form factor | F π | 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 a μ π π , LO ( 600 − 900 MeV / c 2 ) = ( 368.2 ± 2.5 s t a t . ± 3.3 s y s t . ) ⋅ 10 − 10 .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 | Nuclear and Particle Physics Proceedings |