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http://dx.doi.org/10.1103/physrevd.48.5133 | DOI Listing |
Phys Rev Lett
July 2020
Mathematical Institute, University of Oxford, Oxford OX2 6GG, United Kingdom.
We present all-multiplicity formulas for the tree-level scattering of gluons and gravitons in the maximal helicity violating (MHV) helicity configuration, calculated in certain chiral strong fields. The strong backgrounds we consider are self-dual plane waves in gauge theory and general relativity, which are treated exactly and admit a well-defined S matrix. The gauge theory background-coupled MHV amplitude is simply a dressed analog of the familiar Parke-Taylor formula, but the gravitational version has nontrivial new structures due to graviton tails.
View Article and Find Full Text PDFPhys Rev Lett
March 2019
Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, D-80805 München, Germany.
We compute the symbol of the full-color two-loop five-particle amplitude in N=4 super Yang-Mills theory, including all nonplanar subleading-color terms. The amplitude is written in terms of permutations of Parke-Taylor tree-level amplitudes and pure functions to all orders in the dimensional regularization parameter, in agreement with previous conjectures. The answer has the correct collinear limits and infrared factorization properties, allowing us to define a finite remainder function.
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