String correlators: recursive expansion, integration-by-parts and scattering equations
文献类型：期刊论文
| 作者 | He, Song2 ; Teng, Fei1; Zhang, Yong2
|
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2019 |
| 期号 | 9页码:85 |
| 关键词 | AMPLITUDES TREE |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP09(2019)085 |
| 英文摘要 | We further elaborate on the general construction proposed in [1], which connects, via tree-level double copy, massless string amplitudes with color-ordered QFT amplitudes that are given by Cachazo-He-Yuan formulas. The current paper serves as a detailed study of the integration-by-parts procedure for any tree-level massless string correlator outlined in the previous letter. We present two new results in the context of heterotic and (compactified) bosonic string theories. First, we find a new recursive expansion of any multitrace mixed correlator in these theories into a logarithmic part corresponding to the CHY integrand for Yang-Mills-scalar amplitudes, plus correlators with the total number of traces and gluons decreased. By iterating the expansion, we systematically reduce string correlators with any number of subcycles to linear combinations of Parke-Taylor factors and similarly for the case with gluons. Based on this, we then derive a CHY formula for the corresponding (DF)(2) + YM + phi(3) amplitudes. It is the first closed-form result for such multitrace amplitudes and thus greatly extends our result for the single-trace case. As a byproduct, it gives a new CHY formula for all Yang-Mills-scalar amplitudes. We also study consistency checks of the formula such as factorizations on massless poles. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27096]  |
| 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.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 3.Uppsala Univ, Dept Phys & Astron, S-75108 Uppsala, Sweden |
| 推荐引用方式 GB/T 7714 | He, Song,Teng, Fei,Zhang, Yong. String correlators: recursive expansion, integration-by-parts and scattering equations[J]. JOURNAL OF HIGH ENERGY PHYSICS,2019(9):85. |
| APA | He, Song,Teng, Fei,&Zhang, Yong.(2019).String correlators: recursive expansion, integration-by-parts and scattering equations.JOURNAL OF HIGH ENERGY PHYSICS(9),85. |
| MLA | He, Song,et al."String correlators: recursive expansion, integration-by-parts and scattering equations".JOURNAL OF HIGH ENERGY PHYSICS .9(2019):85. |
入库方式： OAI收割
来源：理论物理研究所
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