在阈值顶-反顶生产中实现不变质量切割和有限寿命效应
Implementing invariant mass cuts and finite lifetime effects in top-antitop production at threshold
摘要：
讨论了在阈附近的顶对产生截面中有限顶夸克宽度的影响。我们引入了一个$t\bar{t}$截面与切割的顶部和反顶部的不变质量，可以计算理论与有效场论（EFT）的方法。简要介绍了在NRQCD框架中实现物理相空间边界的匹配过程（“相空间匹配”）。
英文摘要：
The effects of the finite top quark width in the top pair production cross section close to the threshold are discussed in this talk. We introduce a $t\bar{t}$ cross section with a cut on the invariant masses of the top and antitop that can be calculated theoretically with effective field theory (EFT) methods. The matching procedure to implement the physical phase-space boundaries in the NRQCD framework (``phase-space matching'') is briefly outlined.
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