Pfaffian diagrams for gluon tree amplitudes

doi:10.1103/PhysRevD.98.076002

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	Pfaffian diagrams for gluon tree amplitudes
	Lam, CS
刊名	PHYSICAL REVIEW D
	2018
卷号	98 期号:7 页码:76002
ISSN号	2470-0010
DOI	10.1103/PhysRevD.98.076002
英文摘要	Pfaffian diagrams are formulated to represent gluon amplitudes computed from the Cachazo-He-Yuan (CHY) formula. They may be regarded as a systematic regrouping of Feynman diagrams after internal momenta are expanded and products of vertex factors are evaluated. This reprocessing enables gluon amplitudes expressed in Pfaffian diagrams to contain fewer terms. For example, there are 19 terms for the four-point amplitude in Pfaffian diagrams and 35 terms in Feynman diagrams. Gauge invariance is simpler and more explicit in Pfaffian diagrams, in that the subset of diagrams with the same root configuration is already gauge invariant in all lines but two. In getting to these results, several technical difficulties must be overcome. Double poles must be converted to simple poles, integrations must be carried out directly and formulated into simple rules, and the three Mobius constant lines must be suitably chosen to minimize the number of terms present.
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/311006/22802]
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.[Lam, C. S.] McGill Univ Montreal, Dept Phys, Montreal, PQ H3A 2T8, Canada 2.[Lam, C. S.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada 3.[Lam, C. S.] Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lam, CS. Pfaffian diagrams for gluon tree amplitudes[J]. PHYSICAL REVIEW D,2018,98(7):76002.
APA	Lam, CS.(2018).Pfaffian diagrams for gluon tree amplitudes.PHYSICAL REVIEW D,98(7),76002.
MLA	Lam, CS."Pfaffian diagrams for gluon tree amplitudes".PHYSICAL REVIEW D 98.7(2018):76002.