Top quark production at threshold with O(α_s²) accuracy

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• 作者：Melnikov ; Kirill ; Yelkhovsky ; Alexander
• 关键词：14.65.Ha ; 13.85.Lg ; 12.38.Bx ; Top quark ; Radiative corrections
• 刊名：Nuclear Physics B
• 出版年：1998
• 期刊代码：45_05503213
• 类别：ph
• 出版时间：September 14, 1998
• 卷：528
• 期：1-2
• 页码：59-72
• 文件大小：536 K

摘要

We calculate the next-to-next-to-leading order correction to the cross section for top quark pair production in e⁺e⁻ annihilation in the threshold region, resumming all O[(α_s/β)ⁿ × (α²_s, β², α_sβ)] terms of perturbation series. We find that the magnitude of the NNLO correction is comparable to the size of the NLO corrections.