Whr did the elecrons come from?

[sruthisupriya]

when we talk abt BBN, we only talk abt the nucleons. whr did th electrons come from? was it just beta decay or something else?

 

[hellfire]

Actually nucleons did not form during big-bang nucleosynthesis. The big-bang nucleosynthesis fuses them into light elements, fixing relative abundances of the elements. The nucleons formed previously in a period or process called baryogenesis. For electrons, the corresponding process is called leptogenesis.

 

[windscar]

At what time frame do photon's appear in the current Big Bang Theory?

 

[mathman]

At what time frame do photon's appear in the current Big Bang Theory?

At the very beginning.

 

[christianjb]

Actually nucleons did not form during big-bang nucleosynthesis. The big-bang nucleosynthesis fuses them into light elements, fixing relative abundances of the elements. The nucleons formed previously in a period or process called baryogenesis. For electrons, the corresponding process is called leptogenesis.

'Leptogenesis'. That's such a beautiful word! Now to casually drop that into a conversation when buying milk.