String Amplitudes from Field-Theory Amplitudes and Vice Versa
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| 论文题目: |
String Amplitudes from Field-Theory Amplitudes and Vice Versa |
| 论文题目英文: |
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| 作者: |
He, Song; Teng, Fei; Zhang, Yong |
| 论文出处: |
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| 刊物名称: |
PHYSICAL REVIEW LETTERS |
| 年: |
2019 |
| 卷: |
122 |
| 期: |
21 |
| 页: |
211603 |
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| 摘要: |
We present an integration-by-parts reduction of any massless tree-level string correlator to an equivalence class of logarithmic finzctions, which can be used to define a field-theory amplitude via a Cachazo-He-Yuan (CHY) formula. The string amplitude is then shown to be the double copy of the field theory one and a special disk or sphere integral. The construction is generic as it applies to any correlator that is a rational function of correct SL(2) weight. By applying the reduction to open bosonic or heterotic strings, we get a closed-form CHY integrand for the (DF)(2) + Yang-Mills + phi(3) theory. |
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