1 citations · 5 across the 7 of their papers we have counts for
10 papers
String Amplitudes on Integer Rectangles
Song He, Yong Zhang, Fan Zhu +1
Hidden zeros of tree-level string amplitudes of colored scalars lie on loci specified by integer-valued dimensionless momentum contractions arranged in rectangles on the kinematic…
Tropical and Stringy Integrals for In-In Correlators
Song He, Xiang Li, Yong-Xiang Su +1
We introduce tropical and stringy integrals for fixed-graph contributions to cosmological in-in correlators of conformally coupled scalars. The full-time representation factorizes…
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…
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…
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…
Pions from higher-dimensional gluons: general realizations and stringy models
Jin Dong, Xiang Li, Fan Zhu
In this paper we revisit the general phenomenon that scattering amplitudes of pions can be obtained from "dimensional reduction" of gluons in higher dimensions in a more general co…