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He, S; Zhang, Y; 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.
Connected formulas for amplitudes in standard model
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
语种英语
关键词Effective Field Theories Higgs Physics Perturbative Qcd Scattering Amplitudes
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.
2017
期号3页码:93
学科领域Physics
DOIhttp://dx.doi.org/10.1007/JHEP03(2017)093
项目资助者Thousand Young Talents program ; Thousand Young Talents program ; Thousand Young Talents program ; Thousand Young Talents program ; Key Research Program of Frontier Sciences of CAS [QYZDBSSW-SYS014] ; Key Research Program of Frontier Sciences of CAS [QYZDBSSW-SYS014] ; Key Research Program of Frontier Sciences of CAS [QYZDBSSW-SYS014] ; Key Research Program of Frontier Sciences of CAS [QYZDBSSW-SYS014] ; NSFC [11235003] ; NSFC [11235003] ; NSFC [11235003] ; NSFC [11235003]
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22103
专题理论物理所科研产出_SCI论文
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.
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GB/T 7714
He, S,Zhang, Y,He, S ,et al. Connected formulas for amplitudes in standard model[J]. JOURNAL OF HIGH ENERGY PHYSICS,2017(3):93.
APA He, S,Zhang, Y,He, S ,&He, S .(2017).Connected formulas for amplitudes in standard model.JOURNAL OF HIGH ENERGY PHYSICS(3),93.
MLA He, S,et al."Connected formulas for amplitudes in standard model".JOURNAL OF HIGH ENERGY PHYSICS .3(2017):93.
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