Symbol Alphabets from Plabic Graphs II: Rational Letters
| Autor: | Mago, Jorge, Schreiber, Anders, Spradlin, Marcus, Srikant, Akshay Yelleshpur, Volovich, Anastasia |
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| Rok vydání: | 2020 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP04(2021)056 |
| Popis: | Symbol alphabets of n-particle amplitudes in N=4 super-Yang-Mills theory are known to contain certain cluster variables of Gr(4,n) as well as certain algebraic functions of cluster variables. The first paper arXiv:2007.00646 in this series focused on n=8 algebraic letters. In this paper we show that it is possible to obtain all rational symbol letters (in fact all cluster variables) by solving matrix equations of the form C Z = 0 if one allows C to be an arbitrary cluster parameterization of the top cell of Gr_+(n-4,n). Comment: 10 pages, 2 figures; v2: minor typos corrected |
| Databáze: | arXiv |
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