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Logarithmic Wavelets for Dark Matter--Phonon Scattering
Xu-Xiang Li, Zhengkang Zhang
Phonon excitations in crystals are a promising detection channel for sub-GeV dark matter (DM), and anisotropic targets add directional sensitivity through the daily modulation of t…
Astrophysical Uncertainties in Sub-GeV Dark Matter Detection via Single Phonon Excitations
Xu-Xiang Li, Navaneetha Valsan, Zhengkang Zhang
We present the first systematic study of how local dark matter velocity distribution uncertainties propagate into direct detection rates for dark matter--single phonon scattering.…
An Effective Sphaleron Awakens
Xu-Xiang Li, Michael J. Ramsey-Musolf, Tuomas V. I. Tenkanen +1
Using thermal effective field theory, we present a self-consistent perturbative formulation of the Higgs phase sphaleron rate after a radiatively-induced first-order phase transiti…
The Geometric Universal One-Loop Effective Action
Xu-Xiang Li, Xiaochuan Lu, Zhengkang Zhang
We derive universal formulae for integrating out heavy degrees of freedom in scalar field theories up to one-loop level in terms of covariant quantities associated with the geometr…