Bootstrapping a Two-Loop Four-Point Form Factor

doi:10.1103/PhysRevLett.127.151602

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	Bootstrapping a Two-Loop Four-Point Form Factor
	Guo, Yuanhong 1; Wang, Lei 1; Yang, Gang 1,2,3
刊名	PHYSICAL REVIEW LETTERS
	2021
卷号	127 期号:15 页码:151602
关键词	AMPLITUDES UNITARITY BEHAVIOR
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.127.151602
英文摘要	We compute the two-loop four-point form factor of a length-3 half-BPS operator in planar N = 4 SYM theory, which belongs to the class of two-loop five-point scattering observables with one off-shell colorsinglet leg. A new bootstrapping strategy is developed to obtain this result by starting with an ansatz expanded in terms of master integrals and then solving the master coefficients via various physical constraints. We find that consistency conditions of infrared divergences and collinear limits, together with the cancellation of spurious poles, can fix a significant part of the ansatz. The remaining degrees of freedom can be fixed by one simple type of two-double unitarity cut. Full analytic results in terms of both symbol and Goncharov polylogarithms are provided.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27591]
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	1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 3.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 4.UCAS, Int Ctr Theoret Phys Asia Pacific Beijing Hangzho, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Guo, Yuanhong,Wang, Lei,Yang, Gang. Bootstrapping a Two-Loop Four-Point Form Factor[J]. PHYSICAL REVIEW LETTERS,2021,127(15):151602.
APA	Guo, Yuanhong,Wang, Lei,&Yang, Gang.(2021).Bootstrapping a Two-Loop Four-Point Form Factor.PHYSICAL REVIEW LETTERS,127(15),151602.
MLA	Guo, Yuanhong,et al."Bootstrapping a Two-Loop Four-Point Form Factor".PHYSICAL REVIEW LETTERS 127.15(2021):151602.