期刊
NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS
卷 282, 期 -, 页码 158-162出版社
ELSEVIER
DOI: 10.1016/j.nuclphysbps.2016.12.030
关键词
electron-positron annihilation into hadrons; timelike domain; dispersion relations; pi(2)-terms
High-energy behavior of R-ratio of electron-positron annihilation into hadrons is studied. in particular, it is argued that at any given order of perturbation theory the re-expansion of the R-ratio in the ultraviolet asymptotic can be reduced to the form of power series in the naive continuation of the strong running coupling into the timelike domain. The convergence range of the re-expanded R-ratio and the corresponding higher-order pi(2)-terms are discussed.
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