Abstract
We reexamine charge quantization in the standard model with and without a right-handed neutrino. We remark that, without the right-handed neutrino, only the standard charges are allowed for Weyl quarks and leptons under the standard group. With it, there are two independent quantized hypercharge and electric-charge assignments and nonquantized charge assignments would result from linear combinations of these two. One more condition is sufficient to recover the unique correct charge quantization. © 1990 The American Physical Society.