@article{Particle:5730,
      recid = {5730},
      author = {Lewis, Charles Mark},
      title = {Particle Physics in the Sub-keV Energy Regime},
      publisher = {University of Chicago},
      school = {Ph.D.},
      address = {2023-03},
      pages = {267},
      abstract = {Coherent elastic neutrino-nucleus scattering (CE$\nu$NS)  and other rare-event physics searches, like dark matter  detection, have been especially furthered by increasing  sensitivity to low-energy particle interactions.  Experiments using multiple detector technologies have  sought CE$\nu$NS at the most intense terrestrial sources of  neutrinos: spallation facilities and nuclear reactors. This  thesis reports on the feasibility of using cryogenic pure  CsI as an improved next-generation CE$\nu$NS target at the  up-and-coming European Spallation Source. Calibrations and  simulations presented here predict an increase by a factor  of at least $\sim33$ in the rate of observable  neutrino-induced events per unit mass, compared to past use  of room-temperature CsI[Na]. Also reported is the first  measurement of CE$\nu$NS from antineutrinos at the Dresden  Generating Station, a power nuclear reactor, employing a  large-mass semiconducting germanium diode dubbed NCC-1701.  In each section on detecting these neutrino couplings, the  importance of understanding device response to low-energy  nuclear recoils is highlighted. Finally, finding synergy  for tools developed to extricate sub-keV CE$\nu$NS signals,  a search for the exotic mode of muon decay $\mu^+  \xrightarrow{} e^+X$ was performed. New sensitivity limits  in previously untouched parameter space for a massive boson  dark matter candidate of cosmological interest are  presented.},
      url = {http://knowledge.uchicago.edu/record/5730},
      doi = {https://doi.org/10.6082/uchicago.5730},
}