Search for a Scalar Axion-like Particle at 34 GHz
  Light axion-like particles (ALPs) that couple to two photons are allowed in a
number of proposed extensions to the Standard Model of elementary particles. Of
particular interest from a theoretical and observational standpoint is the
energy regime near 0.1 meV. We present results from a pilot experiment to
search for a signal from a 0.14 meV scalar ALP by way of its coupling to two
photons. Using a copper resonant cavity cooled to four degrees Kelvin while
immersed in a seven Tesla magnetic field, and coupled to a low noise cryogenic
amplifier and room temperature receiver, we exclude an ALP-driven excess of 34
GHz photons with g$>10^{-8}$/GeV with 5$\sigma$ confidence. We discuss the
ramifications of this initial measurement as well as planned modifications to
the experiment for increased sensitivity.
