# Shouldn't LHC have used $p\bar{p}$ collisions, instead of $pp$ collisions, to study baryogenesis?

Baryogenesis is the physical process(es) that produced baryon antibaryon asymmetry in the early universe. That means, the laws that governed the bigbang was baryon-antibaryon symmetric.

On the other hand it is usually said that LHC is probing the early universe by creating similar conditions of the early universe.

My question is, by using $p\bar{p}$ collisions, instead of $pp$ collisions, we are not exactly reproducing the early conditions of the universe because the conditions we created are not baryon antibaryon symmetric, are we?

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–  dmckee Jul 26 '12 at 23:18

While there are advantages to $p\bar{p}$, they are not overwhelming and the luminosity issue drives all.