That was a very strange sentence to read. Is that really how little they assume the reader knows? I almost took it as a comment on the expected quality of the peer review.

It's also worth noting that for a paper from the collaboration to have to got to the preprint stage it will have gone through a very strict internal review process with several layers.

Source: I working in the LHCb collaboration for several years.

I'm pretty sure the average american does not know what peer review means.

The writing is so terrible it is almost tongue-in-cheek to be imagined as recited by Sheldon Cooper. And no author credit.