We report the first results of the GammeV experiment, a search for milli-eV mass particles with axion-like 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 3.1x10^{-7} GeV^{-1} (3.5x10^{-7} GeV^{-1}) in the limit of massless particles.
Axion Generation in a Three-Dimensional Optical Trap
School of Medical Science and Engineering, Beijing Institute of Technology（北京理工大学医学科学与工程学院）；School of Physics, Beijing Institute of Technology（北京理工大学物理学院）
Multi-tesla operation of high-temperature superconducting cavities for accelerated axion dark matter searches
Institute for Basic Science（基础科学研究院）；INFN-Sezione di Padova（意大利国家核物理学院帕多瓦分部）；Dark Matter Axion Group, Institute for Basic Science（基础科学研究院暗物质轴子小组）；Department of Physics, Korea Advanced Institute of Science and Technology (KAIST)（韩国科学技术院物理系）
University of Texas at Arlington（阿灵顿得克萨斯大学）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；Washington University（华盛顿大学）；Texas A&M University（德克萨斯农工大学）；Department of Physics & Astronomy, University of California, Riverside（加州大学河滨分校物理与天文系）；Brookhaven National Laboratory（布鲁克海文国家实验室）；Nanjing Normal University（南京师范大学）；Institute for Basic Science (IBS)（韩国基础科学研究所）；University of South Dakota（南达科他大学）；Seoul National University（首尔大学）；Kyungpook National University（庆北国立大学）；University of Chicago（芝加哥大学）；University of Pittsburgh（匹兹堡大学）；Korea University Sejong Campus（高丽大学世宗校区）；Chungnam National University（忠南国立大学）；South Dakota School of Mines and Technology（南达科他矿业理工学院）；University of Maryland, College Park（马里兰大学帕克分校）；Jeonbuk National University（全北国立大学）；Northwestern University（西北大学）
University of Texas at Arlington（阿灵顿得克萨斯大学）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；Washington University（华盛顿大学）；Texas A&M University（德克萨斯农工大学）；Department of Physics & Astronomy, University of California, Riverside（加州大学河滨分校物理与天文学系）；Brookhaven National Laboratory（布鲁克海文国家实验室）；Nanjing Normal University（南京师范大学）；Institute for Basic Science (IBS)（韩国基础科学研究所）；University of South Dakota（南达科他大学）；Seoul National University（首尔大学）；Kyungpook National University（庆北国立大学）；University of Chicago（芝加哥大学）；University of Pittsburgh（匹兹堡大学）；Korea University Sejong Campus（韩国大学世宗校区）；Chungnam National University（忠南国立大学）；South Dakota School of Mines and Technology（南达科他矿业理工学院）；University of Maryland, College Park（马里兰大学帕克分校）；Jeonbuk National University（全北国立大学）；Northwestern University（西北大学）
