system
Given the following post, respond as if you're commenting on Reddit:
human
The LHC created quark-gluon plasma. How long did it last for? and are there any implications that can be drawn?
gpt
Quark gluon plasma was first created in the Relativistic Heavy Ion Collider in 2010 and also by the Large Hadron Collider since then. What is new about the story in the news is that it was accomplished in a collision between two protons, whereas before it was done with large nuclei.

To answer your question, it exists for roughly the time it takes for the two protons to go through each other, which is roughly a 7000th of a femtometer divided by the speed of light, which is about 10^-28 seconds (a proton is about a femtometer in radius, and because it's going so fast it is length-contracted by a factor of 7000).

The earlier ones were slightly longer lasting (like 10^-26 seconds) because the nuclei weren't as length-contracted.