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题名: Two-loop SL(2) form factors and maximal transcendentality
作者: Loebbert, F ;  Sieg, C ;  Wilhelm, M ;  Yang, G
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2016
期号: 12, 页码:90
关键词: Scattering Amplitudes ;  Conformal Field Theory ;  Integrable Field Theories ;  Supersymmetric Gauge Theory
学科分类: Physics
DOI: http://dx.doi.org/10.1007/JHEP12(2016)090
通讯作者: Loebbert, F (reprint author), Humboldt Univ, Inst Phys, Grossen Windkanal 6, D-12489 Berlin, Germany.
文章类型: Article
英文摘要: Form factors of composite operators in the SL(2) sector of N = 4 SYM theory are studied up to two loops via the on-shell unitarity method. The non-compactness of this subsector implies the novel feature and technical challenge of an unlimited number of loop momenta in the integrand's numerator. At one loop, we derive the full minimal form factor to all orders in the dimensional regularisation parameter. At two loops, we construct the complete integrand for composite operators with an arbitrary number of covariant derivatives, and we obtain the remainder functions as well as the dilatation operator for composite operators with up to three covariant derivatives. The remainder functions reveal curious patterns suggesting a hidden maximal uniform transcendentality for the full form factor. Finally, we speculate about an extension of these patterns to QCD.
类目[WOS]: Physics, Particles & Fields
关键词[WOS]: SUPER-YANG-MILLS ;  VERTEX-TYPE DIAGRAMS ;  ONE NONZERO MASS ;  DILATATION OPERATOR ;  ASYMPTOTIC-BEHAVIOR ;  MASTER INTEGRALS ;  LOOP AMPLITUDES ;  WILSON LOOP ;  EQUATION ;  RENORMALIZATION
收录类别: SCI
项目资助者: DFF-FNU [DFF-4002-00037] ;  Chinese Academy of Sciences (CAS) Hundred-Talent Program ;  Key Research Program of Frontier Sciences of CAS [QYZDB-SSW-SYS014] ;  DFG [SFB 647] ;  Marie Curie network GATIS of the European Union's Seventh Framework Programme FP7/under REA Grant [317089]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21459
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Loebbert, F,Sieg, C,Wilhelm, M,et al. Two-loop SL(2) form factors and maximal transcendentality[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016(12):90.
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