I am a bit confused over the meaning of "Preliminary run" when referring to the LHC experiments CMS and ATLAS.

For example in this summary, Figure 2 refers to both the CMS $19.7\ \mathrm{fb^{-1}}$ data at $8\ \mathrm{TeV}$ and ATLAS $4.6\ \mathrm{fb^{-1}}$ data at $7\ \mathrm{TeV}$ as "Preliminary":

Fig. 2 in arXiv:1507.02544v1

Which run does the term "Preliminary run" refer to? Or is it used to mean something else?


1 Answer 1


The term "preliminary" does not refer to the runs. It refers to the status of results and figures that have not been properly reviewed and/or approved for publication yet.

  • 2
    $\begingroup$ In other words it's the analysis that is preliminary, not the raw data. $\endgroup$ Jul 10, 2015 at 10:45

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