BS2 - Scalar fields in cosmology |
|
Speaker |
Flambaum, Victor |
|
Coauthors |
Flambaum, Victor V.; Stadnik, Yevgeny V. |
| Talk Title |
Enhanced non-gravitational effects of dark matter in astrophysics and laboratory experiments |
|
Abstract |
Low-mass boson dark matter particles produced after Big Bang form classical field and/or topological defects. In contrast to traditional dark matter searches, effects produced by interaction of an ordinary matter with this field and defects may be first power in the underlying interaction strength rather than the second power or higher (which appears in a traditional search for the dark matter).This may give an enormous advantage since the dark matter interaction constant is extremely small. Interaction between the density of the dark matter particles and ordinary matter produces both ‘slow’ cosmological evolution and oscillating variations of the fundamental constants including the fine structure constant alpha and particle masses. Atomic Dy, Rb and Cs spectroscopy measurements and the primordial helium abundance data allowed us to improve on existing constraints on the quadratic interactions of the scalar dark matter with the photon, electron, quarks, W, Z and Higgs boson by up to 15 orders of magnitude. Other effects of dark matter include oscillating or transient atomic electric dipole moments and precession of electron and nuclear spins about the direction of Earth’s motion through an axion dark matter. Recent measurements by nEDM collaboration improved the limits on interaction of the low-mass axion with gluons and nucleons up to 3 orders of magnitude. |
|
Talk view |
|
|
|
|