Past Event

Physics Colloquium: "“Tabletop” experiments probing beyond-standard model CP violation at TeV to PeV scales"" with Dr. David Demille

March 4, 2024
12:30 PM - 1:30 PM
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Center for Theoretical Physics

“Tabletop” experiments probing beyond-standard model CP violation at TeV to PeV scales"

Many lines of reasoning led to a decades-long expectation that new fundamental particles should exist with mass below ~1 TeV. Over the past decade, data from many types of experiments have revealed no clear evidence for their existence. This is providing strong motivation for experiments that can detect particles with mass well above the TeV scale. Such heavy particles can affect the properties of ordinary matter, through their virtual contributions to the quantum vacuum that modifies the apparent properties of electrons, quarks, etc. Changes to CP-violating (CPV) observables are especially well-motivated, since some new CPV interactions are required to explain the baryon asymmetry of the universe, and CPV effects are often suppressed in the Standard Model. Recently, methods to detect CPV charge distributions linked to the spins of electrons, protons, and nuclei—such as electric dipole moments and so-called Schiff moments—have been advancing rapidly. Room-scale experiments to detect CPV charge distributions already probe plausible models of physics beyond the Standard Model at scales up to ~100 TeV, and new developments promise to probe beyond the 1 PeV scale in the next 10-15 years. This talk will discuss some experiments of this type from the recent past, near future, and next decade.