From the 1 of 5 linked papers with an AI index.
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geoSCET: Soft Theorems from Power Counting
Timothy Cohen, Patrick Hager, Andreas Helset
The paper develops a Soft Collinear Effective Theory for a geometric scalar field (geoSCET) and uses it to derive geometric soft theorems from power‑counting arguments, extending t…
Hidden simplicity in the scattering for neutron stars and black holes
Rafael Aoude, Andreas Helset
Heavy particle effective theory applied to spinning black holes provides a natural framework in which propagators linearize and numerators exponentiate. In this work, we exploit th…
Field Redefinitions Can Be Nonlocal
Timothy Cohen, Matthew Forslund, Andreas Helset
We revisit the lore establishing the allowed space of field redefinitions and show that there are essentially no restrictions. Our conclusions hold to all orders in perturbation th…
Geometry of soft scalars at one loop
Timothy Cohen, Ipak Fadakar, Andreas Helset +1
We extend the soft theorems for scattering amplitudes of scalar effective field theories to one-loop order. Our analysis requires carefully accounting for the fact that the soft li…
A Double Copy of Geometry
Andreas Helset
We propose an extension of the color-kinematics duality for nonlinear sigma models with nonsymmetric cosets. The role of color is played by curvatures in field space. The duality b…
Soft Phonon Theorems
Clifford Cheung, Maria Derda, Andreas Helset +1
A variety of condensed matter systems describe gapless modes that can be interpreted as Nambu-Goldstone bosons of spontaneously broken Poincaré symmetry. In this paper we derive n…