3 papers
hep-th2022
Soft-Collinear Gravity and Soft Theorems
Martin Beneke, Patrick Hager, Robert Szafron
This chapter reviews the construction of ``soft-collinear gravity'', the effective field theory which describes the interaction of collinear and soft gravitons with matter (and the…
hep-ph2020
Small-scale Cosmic Signatures of Feebly Interacting Massive Particles
Patrick Hager, Alexis Kassiteridis
Feebly Interacting Massive Particles (FIMPs), if they exist, should be notoriously difficult to detect even indirectly. In order to constrain them, we derive bounds for feeble theo…
hep-th2019
Unitarity in the Schroedinger Formalism of QFT in Curved Space-Time
Patrick Hager, Maximilian Urban
We review the general quantization of scalar fields in curved space-times in the Schroedinger formalism and discuss the determination of the ground-state. By explicitly computing t…