http://arxiv.org/abs/1504.01798
Scalar dark matter can interact with Standard Model (SM) particles, altering the fundamental constants of Nature in the process. Changes in the fundamental constants during and before Big Bang nucleosynthesis (BBN) produce changes in the primordial abundances of the light elements. In particular, the primordial abundance of $^{4}$He is predominantly determined by the ratio of the neutron-proton mass difference to freeze-out temperature at the time of the weak interaction freeze-out prior to BBN, which is a sensitive function of the fundamental constants. By comparing the measured and calculated (within the SM) primordial abundance of $^{4}$He, we are able to derive stringent constraints on the mass of a scalar dark matter particle $\phi$ together with its interactions with photons, light quarks and massive vector bosons via linear and quadratic couplings in $\phi$. We also derive constraints on the quadratic interaction of $\phi$ with photons from recent atomic dysprosium spectroscopy measurements.
Y. Stadnik and V. Flambaum
Thu, 9 Apr 15
38/52
Comments: 6 pages, 6 figures. arXiv admin note: text overlap with arXiv:1503.08540