2007-12-12 06:08:53 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Electrons and positrons are in a class of particles called leptons, on the same level as quarks. Protons and neutrons on the other hand, are composed of quarks, so they would have had to form after the initial quarks had lost enough energy to coalesce into protons and neutrons.
.
2007-12-12 06:14:24 · answer #1 · answered by tlbs101 7 · 1⤊ 0⤋
I thought that electrons / positrons formed after the inflationary phase change, but before the electoweak symmetry breaking, at about T = 10^12 seconds. Electrons don't need quarks.
Protons & neutrons (3 quarks each) formed when the quark-gluon plasma cooled down, during the hadron epoch after T = 10^-6 seconds.
2007-12-12 16:02:34 · answer #2 · answered by morningfoxnorth 6 · 0⤊ 0⤋
electrons, read "atom" by laurence krauss, it goes into great detail of the process and a lot of other questions you probably have
2007-12-12 14:33:21 · answer #3 · answered by lee s 3 · 0⤊ 0⤋