Low-energy e + e - Hadronic Cross-Section Measurements and Implications for (g-2) of the Muon

7th International Conference on Beauty, Charm, and Hyperons in Hadronic Interactions

McKenna, Janis^1

Department of Physics and Astronomy, University of British Columbia, Vancouver

BC, Canada^1

关键词: Anomalous magnetic moments;    Brookhaven national laboratory;    Center-of-mass energies;    Cross-section measurement;    Initial state;    Initial state radiations;    Radiative process;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/770/1/012037/pdf
DOI  :  10.1088/1742-6596/770/1/012037

来源: IOP

【 摘 要 】

The BABAR Collaboration has performed an intensive program studying low energy hadronic cross sections in e+e-annihilations via initial-state radiation. These measurements are crucial to improve the precision of the Standard Model prediction of the muon anomalous magnetic moment,aμ= 1/2(gμ - 2), and could help shed light on the > 3σ discrepancy between the Standard Model predicted value for and the experimental measurement of performed at Brookhaven National Laboratory. We have published results on a number of initial state radiative processes with two to six hadrons in the final state, at effective center-of-mass energies ranging from ∼1 to 4.5 GeV. We report here on our most recent results obtained using the entire BABAR dataset.