16 papers
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…
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…
Aluminum-Based Superconducting Tunnel Junction Sensors for Nuclear Recoil Spectroscopy
Spencer L. Fretwell, Connor Bray, Inwook Kim +31
The BeEST experiment is searching for sub-MeV sterile neutrinos by measuring nuclear recoil energies from the decay of Be implanted into superconducting tunnel junction (STJ) s…
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…
Characterizing Dark Bosons at Chiral Belle
Carlos Henrique de Lima, David McKeen, Afif Omar +1
We explore the advantages of a polarized electron beam at Belle II, as proposed for ``Chiral Belle'', in the search for invisibly decaying (dark) bosons that weakly couple to the S…
Shake-up and shake-off spectra in the electron capture decay of atomic Be
Mauro Guerra, Inwook Kim, Stephan Friedrich +33
The most stringent laboratory-based experimental limits on the existence of sub-MeV sterile neutrinos are currently set by decay spectroscopy of radioactive Be embedded into su…