| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1853432 | Physics Letters B | 2009 | 7 Pages |
Abstract
Using a data sample with a total integrated luminosity of 10.0 pb−1 collected at center-of-mass energies of 2.6, 3.07 and 3.65 GeV with BESII, cross sections for e+e−e+e− annihilation into hadronic final states (R values) are measured with statistical errors that are smaller than 1%, and systematic errors that are about 3.5%3.5%. The running strong interaction coupling constants αs(3)(s) and αs(5)(MZ2) are determined from the R values.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
M. Ablikim, J.Z. Bai, Y. Bai, Y. Ban, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, X.D. Chen, Y.B. Chen, Y.P. Chu, Y.S. Dai, Z.Y. Deng, S.X. Du, J. Fang, C.D. Fu, C.S. Gao, Y.N. Gao, S.D. Gu, Y.T. Gu, Y.N. Guo, Y.Q. Guo, Z.J. Guo,