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题名: One-loop corrections from higher dimensional tree amplitudes
作者: Cachazo, F ;  He, S ;  Yuan, EY
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2016
期号: 8, 页码:8
关键词: Scattering Amplitudes ;  Field Theories in Higher Dimensions
学科分类: Physics
DOI: http://dx.doi.org/10.1007/JHEP08(2016)008
通讯作者: Cachazo, F (reprint author), Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada.
文章类型: Article
英文摘要: We show how one-loop corrections to scattering amplitudes of scalars and gauge bosons can be obtained from tree amplitudes in one higher dimension. Starting with a complete tree-level scattering amplitude of n + 2 particles in five dimensions, one assumes that two of them cannot be "detected" and therefore an integration over their LIPS is carried out. The resulting object, function of the remaining n particles, is taken to be four-dimensional by restricting the corresponding momenta. We perform this procedure in the context of the tree-level CHY formulation of amplitudes. The scattering equations obtained in the procedure coincide with those derived by Geyer et al. from ambitwistor constructions and recently studied by two of the authors for bi-adjoint scalars. They have two sectors of solutions: regular and singular. We prove that the contribution from regular solutions generically gives rise to unphysical poles. However, using a BCFW argument we prove that the unphysical contributions are always homogeneous functions of the loop momentum and can be discarded. We also show that the contribution from singular solutions turns out to be homogeneous as well.
类目[WOS]: Physics, Particles & Fields
收录类别: SCI
项目资助者: U.S. Department of Energy [DE-SC0009988] ;  Corning Glass Works Foundation Fellowship Fund at the Institute for Advanced Study ;  Government of Canada through Industry Canada ;  Province of Ontario through the Ministry of Research Innovation
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21575
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Cachazo, F,He, S,Yuan, EY. One-loop corrections from higher dimensional tree amplitudes[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016(8):8.
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