13 papers
Planar loop integrands from cuts in dimensions
Fan Zhu, Song He, Zhenqi Han
We present a direct reconstruction formula for planar loop integrands from -dimensional generalized unitarity cuts in any colored theory. The reconstruction combinatorics is sep…
Bootstrapping Giant Graviton Correlators
Song He, Canxin Shi, Yichao Tang +1
We develop bootstrap methods for mixed heavy-light four-point correlators in super-Yang--Mills theory at large , where …
Superstring amplitudes meet surfaceology
Qu Cao, Jin Dong, Song He +1
We reformulate tree-level amplitudes in open superstring theory (type-I) in terms of stringy Tr amplitudes with various kinematical shifts in the "curve-integral" formulati…
Loop-Level Double Copy Relations from Forward Limits
Qu Cao, Song He, Yong Zhang +1
We study double copy relations for loop integrands in gauge theories and gravity based on their constructions from single cuts, which are in turn obtained from forward limits of lo…
Constructibility of AdS supergluon amplitudes
Qu Cao, Song He, Yichao Tang
We prove that all tree-level -point supergluon (scalar) amplitudes in AdS can be recursively constructed, using factorization and flat-space limit. Our method is greatly fac…
A Hidden Permutation Symmetry of Squared Amplitudes in ABJM Theory
Song He, Canxin Shi, Yichao Tang +1
We define the square amplitudes in planar Aharony-Bergman-Jafferis-Maldacena theory (ABJM), analogous to that in super-Yang-Mills theory (SYM). Surprisingly, the…