by Maxim Khlopov on Thu 6 Jan 2011 19:18
Dear Larisa,
I use this occasion to wish you a very Happy new year.
Let's turn now to your questions:
Вот что такое Дираковская масса - понятно, а что такое Майорановская - не очень.
Dirac mass relates right and left handed particles. Majorana mass links left-handed neutrino to right-handed ANTI-neutrino. It is evident that only neutral particles can have Majorana mass, since for charged particles it is prohibited by charge conservation. In the set of elementary particles (quarks and leptons) only neutrino is neutral and can have Majorana mass.
Когда Вы говорите про фамилоны и аксионы, Вы говорите, что "они должны взаимодействовать с ... с константой связи обратно пропорциональной шкале нарушения симметрии ...". Не очень понятно тогда в этом контексте, что такое шкала нарушения симметрии.
Familons and axions are Goldstone particles - they appear in the result of global symmetry breaking: familons due to breaking of symmetry of families and axions due to breaking of Peccei-Quinn global symmetry. Both symmetry of families and Peccei-Quinn symmetry are broken at high energy scale V. It is the inverse of that energy scale 1/V that enters coupling constants of quarks and leptons as m/V (where pending on model m is some combination of quark or lepton masses). In particular, since V>>m, axion coupling is suppressed and people call it "invisible axion".
Regards
M.Yu.Khlopov
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]