232 citations · 3.9k across the 80 of their papers we have counts for
10 papers · 2 filters
Semi-abelian Z-theory: NLSM+phi^3 from the open string
John Joseph M. Carrasco, Carlos R. Mafra, Oliver Schlotterer
We continue our investigation of Z-theory, the second double-copy component of open-string tree-level interactions besides super-Yang-Mills (sYM). We show that the amplitudes of th…
New Relations for Gauge-Theory and Gravity Amplitudes at Loop Level
Song He, Oliver Schlotterer
In this letter, we extend the tree-level Kawai--Lewellen--Tye (KLT) and Bern--Carrasco--Johansson (BCJ) amplitude relations to loop integrands of gauge theory and gravity. By rearr…
String-motivated one-loop amplitudes in gauge theories with half-maximal supersymmetry
Marcus Berg, Igor Buchberger, Oliver Schlotterer
We compute one-loop amplitudes in six-dimensional Yang-Mills theory with half-maximal supersymmetry from first principles: imposing gauge invariance and locality on an ansatz made…
Non-abelian -theory: Berends-Giele recursion for the -expansion of disk integrals
Carlos R. Mafra, Oliver Schlotterer
We present a recursive method to calculate the -expansion of disk integrals arising in tree-level scattering of open strings which resembles the approach of Berends and Giele t…
Abelian Z-theory: NLSM amplitudes and alpha'-corrections from the open string
John Joseph M. Carrasco, Carlos R. Mafra, Oliver Schlotterer
In this paper we derive the tree-level S-matrix of the effective theory of Goldstone bosons known as the non-linear sigma model (NLSM) from string theory. This novel connection rel…
Amplitude relations in heterotic string theory and Einstein-Yang-Mills
Oliver Schlotterer
We present all-multiplicity evidence that the tree-level S-matrix of gluons and gravitons in heterotic string theory can be reduced to color-ordered single-trace amplitudes of the…
Einstein-Yang-Mills from pure Yang-Mills amplitudes
Dhritiman Nandan, Jan Plefka, Oliver Schlotterer +1
We present new relations for scattering amplitudes of color ordered gluons and gravitons in Einstein-Yang-Mills theory. Tree-level amplitudes of arbitrary multiplicities and polari…
From maximal to minimal supersymmetry in string loop amplitudes
Marcus Berg, Igor Buchberger, Oliver Schlotterer
We calculate one-loop string amplitudes of open and closed strings with N=1,2,4 supersymmetry in four and six dimensions, by compactification on Calabi-Yau and K3 orbifolds. In par…
One-loop superstring six-point amplitudes and anomalies in pure spinor superspace
Carlos R. Mafra, Oliver Schlotterer
We present the massless six-point one-loop amplitudes in the open and closed superstring using BRST cohomology arguments from the pure spinor formalism. The hexagon gauge anomaly i…
Universality in string interactions
Yu-tin Huang, Oliver Schlotterer, Congkao Wen
In this letter, we provide evidence for universality in the low-energy expansion of tree-level string interactions. More precisely, in the alpha'-expansion of tree-level scattering…