Tuesday, January 17, 2006, 3:30 pm — Large Seminar Room, Bldg. 510
We report on a precision measurement of the neutral weak force between two electrons from the E158 experiment at the Stanford Linear Accelerator Center. The neutral weak interaction amplitude is isolated by measuring the fractional change, under a mirror reflection, of the
scattering probability of highly energetic longitudinally polarized electrons off unpolarized target electrons. The short range of the weak force makes it a good testing ground to search for substructure of the fundamental constituents of matter and for new shorter range forces
between them. While the weak force between an electron and positron has been extensively studied, that between two electrons has never directly been measured before. After a description of the experiment and the final results, the prospects for even more precise measurements at future facilities will be discussed.
Hosted by: David Jaffe
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