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High Energy Physics Seminar

Monday, March 27, 2023
4:00pm to 5:00pm
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Online and In-Person Event
A New Bound on the Electron's Electric Dipole Moment
Trevor Wright, University of Colorado,

The Standard Model cannot explain the dominance of matter over anti-matter in our universe, which indicates the existence of undiscovered charge-parity (CP) symmetry violation.  Proposed particle physics theories predict new particles that violate CP-symmetry, which generically induce an electric dipole moment in the electron (eEDM).  I will present the most precise measurement of the eEDM to date using electrons confined inside molecular ions, subject to a huge intra-molecular electric field, and evolving coherently for up to three seconds.  Our result is consistent with zero and improves on the previous upper bound of the eEDM by a factor of ∼ 2.4.  Our sensitivity to 10−19 eV shifts in molecular ions provides constraints on broad classes of new physics at energies an order of magnitude beyond the direct reach of the Large Hadron Collider.

The talk is in 469 Lauritsen.

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