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SUMMARY:Searching for new physics with ultracold molecules - Michael Tarbu
 tt (Imperial College)
DTSTART:20250219T161500Z
DTEND:20250219T171500Z
UID:TALK226162@talks.cam.ac.uk
CONTACT:Lucas Sá
DESCRIPTION:In the Standard Model of particle of physics\, the electron ha
 s a tiny permanent electric dipole moment (EDM). In most theories that ext
 end the Standard Model\, this EDM is predicted to be many orders of magnit
 ude larger due to new CP-violating mechanisms. Thus\, EDM measurements are
  searches for new CP-violating physics which is deeply connected to the pu
 zzle of the matter-antimatter asymmetry of the Universe. The most precise 
 measurements of the electron EDM all use molecules. The molecules are spin
  polarized\, and the EDM determined by measuring the spin precession frequ
 ency in an applied electric field. The precession is due to the interactio
 n of the EDM with an effective electric field which can be exceptionally l
 arge for heavy polar molecules. To reach high precision we need long spin 
 precession times\, which is only possible with neutral molecules if they a
 re cooled to microkelvin temperatures. I will present our efforts to measu
 re the electron EDM using laser-cooled YbF molecules\, both in a beam and\
 , in the future\, trapped in an optical lattice.
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, J.J. Thomson Avenu
 e
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