29 citations · 62 across the 13 of their papers we have counts for
15 papers · 1 filter
The Hydrotope in the Water-Wave Action
Qu Cao, Song He, Jirong Jing +1
The Hydrotope gives a geometric representation of tree-level water-wave amplitudes with two negative spatial momenta as the volume of a hyperplane slice of a box. We trace the orig…
NLSM amplitudes from a quartic two-derivative theory
Qu Cao, Zhenqi Han, Fan Zhu
We revisit the well-known nonlinear sigma model (NLSM), an effective field theory describing the scattering of Goldstone bosons and characterized by an infinite to…
Uniqueness and Analytic Structures of Bosonic String Effective Amplitudes
Qu Cao, Fan Zhu
We revisit the zero-transcendentality sector of bosonic string effective amplitudes with spin-1 external states, conjectured to correspond to a mass-deformed theory, known…
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…
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" formulatio…
Form factors from string amplitudes
Qu Cao
In this letter, we propose a stringy model for -point tree-level form factor with the off-shell operator in the scalar and gluon theories, from the bosonic string disk amplitude…
All-loop planar integrands in Yang-Mills theory from recursion
Qu Cao, Fan Zhu
In this letter, we generalize the recursion methods based on cut equations arXiv:2412.21027, originally developed for scalar theories, to gluons in pure Yang-Mills theory. In gauge…
On one-loop amplitudes in gauge theories
Qu Cao, Jin Dong, Song He +1
We propose a new ``universal expansion" for one-loop amplitudes with arbitrary number of gluons in dimensions, which holds for general gauge theories with gluons/fermions/scala…
Surface Kinematics and "The" Yang-Mills Integrand
Nima Arkani-Hamed, Qu Cao, Jin Dong +2
It has been a long-standing challenge to define a canonical loop integrand for non-supersymmetric gluon scattering amplitudes in the planar limit. Naive integrands are inflicted wi…
Supergluon scattering in AdS: constructibility, spinning amplitudes, and new structures
Qu Cao, Song He, Xiang Li +1
We elaborate on a new recursive method proposed in arXiv:2312.15484 for computing tree-level -point supergluon amplitudes as well as those with one gluon, i.e., spinning amplitu…
On universal splittings of tree-level particle and string scattering amplitudes
Qu Cao, Jin Dong, Song He +2
In this paper, we study the newly discovered universal splitting behavior for tree-level scattering amplitudes of particles and strings~\cite{Cao:2024gln}: when a set of Mandelstam…
A universal splitting of string and particle scattering amplitudes
Qu Cao, Jin Dong, Song He +1
We propose a new splitting behavior of tree-level string/particle amplitudes for scalars, gluons and gravitons. We identify certain subspaces in the space of Mandelstam variables,…
Scalar-Scaffolded Gluons and the Combinatorial Origins of Yang-Mills Theory
Nima Arkani-Hamed, Qu Cao, Jin Dong +2
We present a new formulation for Yang-Mills scattering amplitudes in any number of dimensions and at any loop order, based on the same combinatorial and binary-geometric ideas in k…
Hidden zeros for particle/string amplitudes and the unity of colored scalars, pions and gluons
Nima Arkani-Hamed, Qu Cao, Jin Dong +2
Recent years have seen the emergence of a new understanding of scattering amplitudes in the simplest theory of colored scalar particles - the Tr theory - based on combinator…
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…