Abstract
We bootstrap the symbol of the maximal-helicity-violating four-particle form factor for the chiral part of the stress-tensor supermultiplet in planar N=4 super-Yang-Mills theory at two loops. When minimally normalized, this symbol involves only 34 letters and obeys the extended Steinmann relations in all partially overlapping three-particle momentum channels. In addition, the remainder function for this form factor exhibits an antipodal self-duality: It is invariant under the combined operation of the antipodal map defined on multiple polylogarithms - which reverses the order of the symbol letters - and a simple kinematic map. This self-duality holds on a four-dimensional parity-preserving kinematic hypersurface. It implies the antipodal duality recently noticed between the three-particle form factor and the six-particle amplitude in this theory.
Original language | English |
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Article number | 111601 |
Journal | Physical Review Letters |
Volume | 130 |
Issue number | 11 |
Number of pages | 9 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 16. Mar 2023 |
Externally published | Yes |