A quick post to explain something about this, the first ATLAS physics results from LHC collisions at 7000 GeV.
The measurement is a repeat of the ATLAS minimum bias measurement at 900 GeV, except these protons hit each other at 7000 GeV, an energy 3.5 times higher than we ever managed before in an accelerator. (That link hopefully explains what “minimum bias” means.)
This is not a journal publication, it’s a “preliminary” measurement, to be presented at conferences. Hence the 1.5 in my title – we are working on 2.0, which is intended for a paper. But it is public, and it is useful to put it out there so it can be discussed by physicists who are not on ATLAS. And it does tell us something new.


