250 citations · 1.8k across the 30 of their papers we have counts for
30 papers
Manifest Modular Invariance in the Near-Critical Ising Model
Marcus Berg
Using recent results in mathematics, I point out that free energies and scale-dependent central charges away from criticality can be represented in compact form where modular invar…
Massive Theta Lifts
Marcus Berg, Daniel Persson
We use Poincare series for massive Maass-Jacobi forms to define a "massive theta lift", and apply it to the examples of the constant function and the modular invariant j-function,…
Massive deformations of Maass forms and Jacobi forms
Marcus Berg, Kathrin Bringmann, Terry Gannon
We define one-parameter "massive" deformations of Maass forms and Jacobi forms. This is inspired by descriptions of plane gravitational waves in string theory. Examples include mas…
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…
Constraints on Axion-Like Particles from X-ray Observations of NGC1275
Marcus Berg, Joseph P. Conlon, Francesca Day +4
Axion-like particles (ALPs) can induce localised oscillatory modulations in the spectra of photon sources passing through astrophysical magnetic fields. Ultra-deep Chandra observat…
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…