Bell's Inequality and $\tau$Physics at LEP
Abstract
In this talk given at the TAU92 Workshop, Columbus, OH, Sept. 92, we summarize results presented in more detail in a recent paper by S. Abel, M. Dittmar and the author where we gave a general proof that Bell's inequality can not be tested at a collider experiment. In particular, a measurement of correlated tauspins at LEP does not constitute a test of local realistic theories via Bell's inequality. The central point of the argument is that such tests, where the spins of two particles are inferred from a scattering distribution, can always be described by a local hidden variable theory. In response to questions at the workshop we go beyond the paper and show that an old experiment involving the measurement of the correlated spins of the two photons emitted in positronium decay via Comptonscattering is also not a viable test of Bell's inequality.
 Publication:

arXiv eprints
 Pub Date:
 November 1992
 arXiv:
 arXiv:hepph/9211203
 Bibcode:
 1992hep.ph...11203D
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 7 pages, no figures, Oxford Preprint OUTP9227P