Cottingham and Greenwood give a good presentation of the argument for why there are only 3 generations of neutrinos. The argument comes from the predicted rate of decays of Z to invisible (i.e., neutrinos), compared with the experimentally measured rate. The plot on p. 128 is pretty striking. It makes you think that there really shouldn't be another neutrino beyond the 3 we know of.
Sunday, August 23, 2009
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment