2007/10/31 by A. S. Chou, A. Chou, W. Wester +12 · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Invariant mass #Massless particle #Meson #Nuclear physics #Optics #Particle (ecology) #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pseudoscalar #Scalar (mathematics) #astro-ph #gr-qc #hep-ex
paper · pdf · doi:10.1103/physrevlett.100.080402
published as Phys.Rev.Lett.100:080402, 2008 · 5 pages, 4 figures. This is the version accepted by PRL and includes updated limits
arxiv created 2008/01/16 · openalex publication_date 2008/02/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report the first results of the GammeV experiment, a search for milli-eV mass particles with axionlike couplings to two photons. The search is performed using a ``light shining through a wall'' technique where incident photons oscillate into new weakly interacting particles that are able to pass through the wall and subsequently regenerate back into detectable photons. The oscillation baseline of the apparatus is variable, thus allowing probes of different values of particle mass. We find no excess of events above background and are able to constrain the two-photon couplings of possible new scalar (pseudoscalar) particles to be less than 3.1\ifmmode×\else\texttimes\fi10^\ensuremath-7 GeV^\ensuremath-1 (3.5\ifmmode×\else\texttimes\fi10^\ensuremath-7 GeV^\ensuremath-1) in the limit of massless particles.