by Maxim Khlopov on Tue 8 Jan 2013 19:31
Dear Oleg,
The case of massless fermions seems more natural in the absence of Higgs mechanism.
There is an interesting question, whether charged leptons are massless, or they get some mass due to their electromgnetic interaction. However, in principle, you can go beyond the physics of your model and assume some additional mechanism of mass generation. Then you can retain your results, but you have a set of various stable particles.
Regards
M.Yu.Khlopov
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]