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题名: Connected formulas for amplitudes in standard model
作者: He, S ;  Zhang, Y
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2017
期号: 3, 页码:93
关键词: Effective Field Theories ;  Higgs Physics ;  Perturbative QCD ;  Scattering Amplitudes
学科分类: Physics
DOI: http://dx.doi.org/10.1007/JHEP03(2017)093
通讯作者: He, S (reprint author), Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China. ;  He, S (reprint author), Univ Chinese Acad Sci, Sch Phys Sci, 19A Yunnan Rd, Beijing 100049, Peoples R China.
文章类型: Article
英文摘要: Witten's twistor string theory has led to new representations of S-matrix in massless QFT as a single object, including Cachazo-He-Yuan formulas in general and connected formulas in four dimensions. As a first step towards more realistic processes of the standard model, we extend the construction to QCD tree amplitudes with massless quarks and those with a Higgs boson. For both cases, we find connected formulas in four dimensions for all multiplicities which are very similar to the one for Yang-Mills amplitudes. The formula for quark-gluon color-ordered amplitudes differs from the pure-gluon case only by a Jacobian factor that depends on flavors and orderings of the quarks. In the formula for Higgs plus multi-parton amplitudes, the massive Higgs boson is effectively described by two additional massless legs which do not appear in the Parke-Taylor factor. The latter also represents the first twistor-string/connected formula for form factors.
类目[WOS]: Physics, Particles & Fields
项目资助者: Thousand Young Talents program ;  Key Research Program of Frontier Sciences of CAS [QYZDBSSW-SYS014] ;  NSFC [11235003]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/22103
Appears in Collections:理论物理所2017年知识产出_期刊论文

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Recommended Citation:
He, S,Zhang, Y. Connected formulas for amplitudes in standard model[J]. JOURNAL OF HIGH ENERGY PHYSICS,2017(3):93.
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