Massive quark production in electron positron annihilation to order α_s<SUP>2</SUP>

作     者：Chetyrkin, KG Hoang, AH Kuhn, JH Steinhauser, M Teubner, T 

作者机构：Univ Karlsruhe Inst Theoret Teilchenphys D-76128 Karlsruhe Germany Russian Acad Sci Inst Nucl Res Moscow 117312 Russia Univ Calif San Diego Dept Phys La Jolla CA 92093 USA Max Planck Inst Phys Werner Heisenberg Inst Phys D-80805 Munich Germany DESY D-22603 Hamburg Germany 

出 版 物：《EUROPEAN PHYSICAL JOURNAL C》 (欧洲物理学杂志，C辑：粒子和场)

年 卷 期：1998年第2卷第1期

页      面：137-150页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Perturbation Theory Energy Region Massive Quark Polarization Function Numerical Prediction 

摘      要：Recent analytical and numerical results for the three-loop polarization function allow to present a phenomenological analysis of the cross section for massive quark production in electron positron annihilation to order alpha(s)(2). Numerical predictions based on fixed order perturbation theory are presented for charm and bottom production above 5 and 11.5 GeV, respectively. The contribution from these energy regions to alpha(M-Z(2)), the running QED coupling constant at scale M-Z, are given. The dominant terms close to threshold, i.e. in an expansion for small quark velocity beta, are presented.