The Big Bang

Question 1

How long after the big bang did the first hadrons form?

Answer 1

10^-3 s

Question 2

How long after the big bang did the first leptons form?

Answer 2

10^-5 s

Question 3

When were the first quarks formed during the Big Bang?

Answer 3

10^-12 s

Question 4

Describe the Big Bang up until the formation of the first atomic nuclei

Answer 4

At the start the universe is a very dense singularity

Expansion, high energy photons but no matter

Quarks form, leptons form, quark-gluon plasma

Quarks combine to form hadrons

Neutrons and protons combine to form nuclei