Search for invisible axion dark matter of mass ma=43 μeV with the QUAX– aγ experiment

Search for chameleon scalar fields with the axion dark matter experiment.

Scalar fields with a "chameleon" property, in which the effective particle mass is a function of its local environment, are common to many theories beyond the standard model and could be responsible for dark energy. If these fields couple weakly to the photon, they could be detectable through the afterglow effect of photon-chameleon-photon transitions. The ADMX experiment was used in the first ...

Invisible Axion-Like Dark Matter from Electroweak Bosonic Seesaw

We explore a model based on the classically-scale invariant standard model (SM) with a strongly coupled vector-like dynamics, which is called hypercolor (HC). The scale symmetry is dynamically broken by the vector-like condensation at the TeV scale, so that the SM Higgs acquires the negative mass-squared by the bosonic seesaw mechanism to realize the electroweak symmetry breaking. An elementary...

Search for inelastic dark matter with the CDMS II experiment

Z. Ahmed, D. S. Akerib, S. Arrenberg,* C.N. Bailey, D. Balakishiyeva, L. Baudis, D.A. Bauer, P. L. Brink, T. Bruch, R. Bunker, B. Cabrera, D. O. Caldwell, J. Cooley, E. do Couto e Silva, P. Cushman, M. Daal, F. DeJongh, P. Di Stefano, M. R. Dragowsky, L. Duong, S. Fallows, E. Figueroa-Feliciano, J. Filippini, J. Fox, M. Fritts, S. R. Golwala, J. Hall, R. Hennings-Yeomans, S. A. Hertel, D. Holmg...

The Large Scale U.S. Dark Matter Axion Search

Axion BEC Dark Matter

Cold dark matter axions thermalize through gravitational self-interactions and form a BoseEinstein condensate when the photon temperature reaches approximately 500 eV. Axion Bose-Einstein condensation provides an opportunity to distinguish axions from the other dark matter candidates on the basis of observation. The rethermalization of axions that are about to fall in a galactic potential well ...