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On the Origins of Varying Gauge Couplings
Carlos Henrique de Lima, David McKeen, David E. Morrissey +1
Variations in the gauge couplings of the Standard Model have been searched for experimentally and proposed as solutions to open questions in fundamental physics. Varying gauge coup…
Neutrino Electroweak Couplings and the Neutrino Fog at Belle II
Carlos Henrique de Lima, David McKeen, Afif Omar +1
The mono-photon process at Belle II probes both invisible new states and the electroweak couplings of neutrinos. In this work, we study the proces…
High Energy Photon Polarimetry at Lepton Colliders: Quantum Information from Converted Photons
Carlos Henrique de Lima, Navin McGinnis, David McKeen
We study high-energy photons produced at a lepton collider that convert into an pair in the detector, as a tool for measuring quantum information observables. We consider…
Low-Multiplicity Jets as Probes of GeV-Scale Light-Quark-Coupled Particles
Carlos Henrique de Lima, David McKeen, Maximilian Swiatlowski
We propose a search at the LHC for GeV-scale particles coupling predominantly to light quarks based on low-multiplicity jets. The search targets production in association with a ha…
Hadronic Probes of Non-Standard Neutrino Interactions
Carlos Henrique de Lima, David McKeen, John Ng +1
In this work, we study leptonic decays of hadrons as probes of light neutrinophilic scalars that mediate enhanced neutrino self-interactions. Such scalars can be emitted in process…
X-rays from Inelastic Dark Matter Freeze-in
Gordan Krnjaic, David McKeen, Riku Mizuta +3
We study inelastic dark matter produced via freeze-in through a light mediator with a mass splitting below the electron-positron threshold. In this regime, the heavier dark matter…