تقرير
One-loop diagrams with quadratic propagators from the worldsheet
| العنوان: | One-loop diagrams with quadratic propagators from the worldsheet |
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| المؤلفون: | Feng, Bo, He, Song, Zhang, Yong, Zhang, Yao-Qi |
| سنة النشر: | 2022 |
| المجموعة: | High Energy Physics - Theory |
| مصطلحات موضوعية: | High Energy Physics - Theory |
| الوصف: | It is well known that forward limits of tree-level amplitudes (and those trivalent diagrams they consist of) produce one-loop amplitudes and trivalent diagrams with propagators linear in the loop momentum. They naturally arise from one-loop worldsheet formulae, and an important open problem is how to recombine them into usual one-loop diagrams with quadratic propagators. In this paper, we study a new collection of worldsheet functions: generalized one-loop Parke-Taylor factors with tensor numerators, which are conjectured to serve as a basis for one-loop worldsheet functions with this nice property. We present all-multiplicity, closed-form expressions for combinations of one-loop trivalent diagrams with quadratic propagators and tensor numerators to arbitrary rank (including possible tadpole contributions), produced by any pair of Parke-Taylor factors. We also briefly comment on reducing worldsheet functions onto such a basis, and applications to one-loop amplitudes in physical theories. Comment: 27+11 pages,2 figures; minor changes, clarifications added, published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1007/JHEP08(2022)240 |
| URL الوصول: | http://arxiv.org/abs/2204.13659 |
| رقم الأكسشن: | edsarx.2204.13659 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1007/JHEP08(2022)240 |
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