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SUMMARY:A journey through nine loops\, cluster algebras and Higgs amplitud
 es
DTSTART:20260930T071000Z
DTEND:20260930T081000Z
DTSTAMP:20261003T214300Z
UID:indico-event-31076@indico.ihep.ac.cn
DESCRIPTION:Speakers: 颂 何 (中国科学院理论物理研究所)\n\nHo
 w far can we determine scattering amplitudes without the need for Feynman 
 diagrams or loop integrations? Planar N=4 super-Yang–Mills (sYM) provide
 s an ideal laboratory for uncovering the mathematical structures and physi
 cal relations that make this possible. I will introduce a computational fr
 amework dubbed “automated symbol bootstrap\,” whose symmetry-adapted a
 lgorithm has yielded nine-loop symbols for six-gluon MHV and NMHV amplitud
 es and\, via antipodal duality\, three-point form factors of the stress-te
 nsor multiplet. These results offer new clues to the patterns that organiz
 e perturbation theory across loop orders.Turning to four-point form factor
 s\, I will present our construction of a new cluster algebra for their sym
 bol alphabet\, and discuss how dualities and physical limits connect seemi
 ngly different observables. Finally\, new results for Higgs-plus-four-gluo
 n amplitudes at maximal transcendental weight reveal how some of this simp
 licity extends beyond this supersymmetric laboratory.Bio:何颂，中国
 科学院理论物理研究所研究员、新基石研究员。主要从
 事量子场论、弦论与量子引力研究，近年来尤其关注散
 射振幅等物理量的新计算方法、数学结构及其应用，探
 索基础物理与数学的交叉问题。与合作者共同提出了 Cach
 azo–何–袁（CHY）散射振幅形式，揭示了场论与弦论散
 射的几何和组合结构，并在高圈计算、精确求解及规范
 场、引力与弦论的对偶关系等方向取得了一系列重要成
 果。\n\nhttps://indico.ihep.ac.cn/event/31076/
LOCATION:B105 (CHEP)
URL:https://indico.ihep.ac.cn/event/31076/
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