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Is the electron round?

Event Details

Event Dates: 

Tuesday, June 18, 2013 - 4:00pm

Seminar Location: 

  • JILA X317

Speaker Name(s): 

E. A. Hinds

Speaker Affiliation(s): 

Centre for Cold Matter, Blackett Laboratory, Imperial College London
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Colloquium

Event Details & Abstract: 

We have made a new measurement of the electron’s electric dipole moment (EDM) using a beam of YbF molecules.[1] <#_edn1>By measuring atto-eV energy shifts in a molecule, this experiment probes new physics at the tera-eV energy scale. According to the standard model, this EDM is – some eleven orders of magnitude below the current experimental limit. However, most extensions to the standard model predict much larger values, potentially accessible to measurement[2] <#_edn2>.Hence, the search for the electron EDM is a search for physics beyond the standard model. I will describe our experimental method, our current results and their implications for particle physics.I will also outline the prospects for further major improvement in sensitivity.[1] <#_ednref1>J. J. Hudson, D. M. Kara, I. J. Smallman, B. E. Sauer, M. R. Tarbutt, E. A. Hinds “Improved measurement of the shape of the electron”, Nature *473*, 493 (2011).doi:10.1038/nature10104[2] <#_ednref2>E. D. Commins, /Electric dipole moments of leptons/, in Advances in Atomic, Molecular, and Optical Physics, Vol. 40, B. Bederson and H.Walther (Eds.), Academic Press, New York, pp. 1-56 (1999).