【02.11】Seminar：QCD Resummation at Colliders: Recent Advances and Precision Improvements
Seminar
报告题目：QCD Resummation at Colliders: Recent Advances and Precision Improvements
报告人：鞠万里, 研究助理，加拿大阿尔伯塔大学
主持人：刘涛，副研究员，中国科学院高能物理研究所
报告时间：2026年2月11日（周三），上午10:00
ZOOM：98768284828 / 123456
链接：https://zoom.us/j/98768284828?pwd=Dr7WdnY9R1IPYKIjGV201FH6gHVDci.1
报告摘要：
Accurate theoretical predictions are paramount for precise measurements of Standard Model parameters and searches for new physics. This report reviews recent progress in QCD resummation techniques, highlighting their critical role in improving perturbative convergence in the asymptotic regime and achieving higher logarithmic accuracy.
For the hadroproduction of colourless particles (such as Drell-Yan) and event shapes in $e^+e^-$ annihilation, resummation approaches based on renormalization-group evolution (RGE) and rapidity-renormalization-group evolution (RaGE) within Soft-Collinear Effective Theory (SCET) are discussed. These methods allow resummation of soft and collinear logarithms up to $\text{N}^4\text{LL}’_a + \text{N}^3\text{LO}$.
For colourful final states at the LHC --- in particular top-quark pair production near threshold --- the combined resummation of soft, collinear, and Coulomb corrections using potential non-relativistic QCD (pNRQCD) and SCET is presented. I will prove that up to all perturbative order in $\alpha_S$, the mixed contribution of next-to-leading power vertex and the Coulomb potential will cancel out during the scale evolution. This enables us to pursuit the topological factorization for the toponium production up to NLL$’$+N$^2$LO.
Finally, I will discuss the latest development on the subleading power resummation, with particular emphasis on the overlapping subtraction procedure entailed when matching SCET_I onto SCET_II. Within a mathematically well defined approach, I will present a generic algorithm to organize the zero-bin subtrahend for NLO transverse momentum distribution, which holds at an arbitrary power accuracy and is compatible with all known rapidity-divergence regularization prescriptions. Recent progress toward extending this algorithm to $\text{N}^2\text{LO}$ and higher orders is also discussed.
个人简介：
鞠万里，2016年博士毕业于哈尔滨工业大学，随后在北京大学，杜伦大学（英），国家核子物理研究所（意）进行博士后研究。目前任职阿尔伯塔大学（加）研究助理。主要研究方向是发展QCD有效理论对LHC上的产生湮灭过程进行精确计算。
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