Two-loop octagons, algebraic letters and (Q)over-bar equations

doi:10.1103/PhysRevD.101.061701

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	Two-loop octagons, algebraic letters and (Q)over-bar equations
	He, Song; Li, Zhenjie; Zhang, Chi
刊名	PHYSICAL REVIEW D
	2020
卷号	101 期号:6 页码:61701
ISSN号	2470-0010
DOI	10.1103/PhysRevD.101.061701
英文摘要	We compute the symbol of the first two-loop amplitudes in planar N = 4 SYM with algebraic letters, the eight-point Next to Maximally Helicity Violating (NMHV) amplitude (or the dual octagon Wilson loops). We show how to apply (Q) over bar equations of [S. Caron-Huot and S. He, J. High Energy Phys. 07 (2012) 174] for computing the differential of two-loop n-point NMHV amplitudes and present the result for n = 8 explicitly. The symbol alphabet for octagon consists of 180 independent rational letters and 18 algebraic ones involving Gram-determinant square roots. We comment on all-loop predictions for final entries and aspects of the result valid for all multiplicities.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27126]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China; Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuguan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	He, Song,Li, Zhenjie,Zhang, Chi. Two-loop octagons, algebraic letters and (Q)over-bar equations[J]. PHYSICAL REVIEW D,2020,101(6):61701.
APA	He, Song,Li, Zhenjie,&Zhang, Chi.(2020).Two-loop octagons, algebraic letters and (Q)over-bar equations.PHYSICAL REVIEW D,101(6),61701.
MLA	He, Song,et al."Two-loop octagons, algebraic letters and (Q)over-bar equations".PHYSICAL REVIEW D 101.6(2020):61701.