Y'all might enjoy this from Dan Hooper's (CERN) book ...
"...I am talking about a machine [collider] that collides 700 million protons together every second, adding up to around 10 quadrillion (1E16) pairs of protons to date....But this is tiny when compared to the number of collisions that occurred among particles in the early universe."
A trillionth of a second after the BB, "it will be only about 1E-30 sec or so, on average, before [an] electron interacts with another particle, potentially causing it to transform into another kind of particle. The new particle will then go on to collide and possibly transform again, only 1E-30sec. or so after that. At this rate, about 1E18 interactions take place per particle all within ...1E-12 sec.... [which is far] more than all of the collisions that have ever taken at the LHC put together."
He was emphasizing how it is plausible that new particles may have emerged and disappeared under those conditions, which we aren't able to adequately test.
"...I am talking about a machine [collider] that collides 700 million protons together every second, adding up to around 10 quadrillion (1E16) pairs of protons to date....But this is tiny when compared to the number of collisions that occurred among particles in the early universe."
A trillionth of a second after the BB, "it will be only about 1E-30 sec or so, on average, before [an] electron interacts with another particle, potentially causing it to transform into another kind of particle. The new particle will then go on to collide and possibly transform again, only 1E-30sec. or so after that. At this rate, about 1E18 interactions take place per particle all within ...1E-12 sec.... [which is far] more than all of the collisions that have ever taken at the LHC put together."
He was emphasizing how it is plausible that new particles may have emerged and disappeared under those conditions, which we aren't able to adequately test.