One-loop correlators and BCJ numerators from forward limits

doi:10.1007/JHEP09(2020)079

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	One-loop correlators and BCJ numerators from forward limits
	Edison, Alex ; He, Song 1,2,3,4; Schlotterer, Oliver ; Teng, Fei
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2020
期号	9 页码:79
关键词	COVARIANT QUANTIZATION AMPLITUDES ANOMALIES SUPERSYMMETRY INVARIANCE
ISSN号	1029-8479
DOI	10.1007/JHEP09(2020)079
英文摘要	We present new formulas for one-loop ambitwistor-string correlators for gauge theories in any even dimension with arbitrary combinations of gauge bosons, fermions and scalars running in the loop. Our results are driven by new all-multiplicity expressions for tree-level two-fermion correlators in the RNS formalism that closely resemble the purely bosonic ones. After taking forward limits of tree-level correlators with an additional pair of fermions/bosons, one-loop correlators become combinations of Lorentz traces in vector and spinor representations. Identities between these two types of traces manifest all supersymmetry cancellations and the power counting of loop momentum. We also obtain parity-odd contributions from forward limits with chiral fermions. One-loop numerators satisfying the Bern-Carrasco-Johansson (BCJ) duality for diagrams with linearized propagators can be extracted from such correlators using the well-established tree-level techniques in Yang-Mills theory coupled to biadjoint scalars. Finally, we obtain streamlined expressions for BCJ numerators up to seven points using multiparticle fields.
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/311006/27428]
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.Uppsala Univ, Dept Phys & Astron, SE-75108 Uppsala, Sweden 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 5.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Edison, Alex,He, Song,Schlotterer, Oliver,et al. One-loop correlators and BCJ numerators from forward limits[J]. JOURNAL OF HIGH ENERGY PHYSICS,2020(9):79.
APA	Edison, Alex,He, Song,Schlotterer, Oliver,&Teng, Fei.(2020).One-loop correlators and BCJ numerators from forward limits.JOURNAL OF HIGH ENERGY PHYSICS(9),79.
MLA	Edison, Alex,et al."One-loop correlators and BCJ numerators from forward limits".JOURNAL OF HIGH ENERGY PHYSICS .9(2020):79.