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Current Seminars

Thursday, October 20, 2016
Testing Time-Reversal Symmetry Using Lasers, a Magic Room, and Pear-Shaped Nuclei
​     Reception, 3:30pm in Dow 208
     Seminar, 4pm in Dow 107
​​Jaideep Taggart Singh, National Superconducting Cyclotron Laboratory, Department of Physics and Astronomy, Michigan State University​
Experimental tests of fundamental symmetries using nuclei and other particles subject to the strong nuclear force have led to the discovery of parity (P) violation and the discovery of charge-parity (CP) violation.  It is believed that additional sources of CP-violation may be needed to explain the apparent scarcity of antimatter in the universe. A particularly sensitive and unambiguous signature of both time-reversal- and CP-violation would be the existence of an electric dipole moment (EDM). The next generation of EDM searches in a variety of complimentary systems will have unprecedented sensitivity to physics beyond the Standard Model. I will describe two new searches using different nuclei and laser techniques. The first uses laser-polarized xenon and helium gases in the world's most magnetically quiet large-scale environment located in Munich, Germany. The second uses laser-trapped & -cooled radium atoms in an experiment located at Argonne National Lab. Radium is a particularly attractive choice because its pear-shaped nucleus amplifies the observable effect of CP-violation by several orders of magnitude.
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