Goga Suknidze TSU Physics Faculty I Course Supervisor Mirian Tabidze Axions Search Experiment Theoretical motivation for searching ID: 815610
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Slide1
Speaker: Goga Suknidze TSU, Physics Faculty, I⋁ Course Supervisor: Mirian Tabidze `
Axions
Search Experiment
Slide2Theoretical motivation for searching Axions
The gauge invariant QCD lagrangian is
- m
)
- (1)We can write the term in QCD lagrangian which violates P and T invariance (2) most famously, the term provides a contribution to the neutron electric dipole moment (3)
Slide3Experimental
upper limit on neutron EDM is Therefore this implies has to be really small number
(4)
This is the strong problem.A solution to the strong CP is to leave the term as it is, but to somehow make it irrelevant. Peccei-Quinn achieved this by by introducing an extra global symmetry into the theory. They considered as a field, not a fixed parameter. Such a symmetry leads in turn to the prediction of a new light pseudoscalar particle, the axionAxions are sub-eV mass, spin 0 and charge 0 particles
Slide4Axion searches
overview
Slide5Axion Dark Matter Experiment
The experiment is designed to detect the very weak conversion of dark matter axions into microwave photons in the presence of a strong magnetic field..Mass:
(3) (4) Axion to photon Figure 1Figure 2Figure 3
Slide6ADMX insert
Slide7SEARCH FOR SOLAR AXIONS: THE CAST EXPERIMENT AT CERN
Telescope (CAST) is an experiment to search for axions originating from the sunFigure 4
Slide8Slide9In
Jülich Research Center physicists propose to develop and demonstrate a method of using COSY with an in-plane polarized deuteron beam to search frequency space for a resonance associated with a hypothetical axion field that induces an oscillating electric dipole moment (EDM) on the deuteron.
Slide10Thank you for your attention