From the 1 of 7 linked papers with an AI index.
7 papers
NLSM amplitudes from a quartic two-derivative theory
Qu Cao, Zhenqi Han, Fan Zhu
The paper presents a local scalar Lagrangian with a single quartic two-derivative interaction that exactly reproduces planar nonlinear sigma model (NLSM) amplitudes at all loop ord…
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…
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…
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 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…