PT4 - Variation of the fundamental constants, violation of the fundamental symmetries and dark matter |
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Speaker |
Flambaum, Victor |
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Coauthors |
Flambaum, Victor V.; Stadnik, Yevgeny V. |
| Talk Title |
Enhanced Effects Of Dark Matter, Variation Of The Fundamental Constants And Violation Of The Fundamental Symmetries |
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Abstract |
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 and Higgs boson by up to 15 orders of magnitude. Limits on the linear and quadratic interactions of the dark matter with W and Z bosons have been obtained for the first time. Other effects of dark matter and dark energy include apparent violation of the fundamental symmetries: oscillating or transient atomic electric dipole moments, precession of electron and nuclear spins about the direction of Earth’s motion through an axion dark matter (the axion wind effect), and axion-mediated spin-gravity couplings, violation of Lorentz symmetry and Einstein equivalence principle. 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. Effects of scalar field produced by massive bodies on atomic transition frequencies have been experimentally investigated. Improved limits on axions and low mass Z' boson have been derived from atomic EDM and PNC. |
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