# Higgs Boson revealed video

I'm newbie here, no background in physics, just trying to understand a bit about the Higgs Boson.

I guess the key moment of this video (https://www.youtube.com/watch?v=RC-apKhWNDE) is when Fabiola Gianotti, Ph.D. shows the plots about the combined results (1:43-1:54).

where does the graphics came from? what is the thick and thin line? which units are used for the axes?

Thanks a lot.

The plots are "expected from background" (thin line) vs "observed" (thick line); the horizontal axis is energy (in GeV), with a peak at 125 GeV. On the left is the raw data - the frequency with which certain energies were observed (note it's a log axis); the plot on the right is the "statistical significance" in standard deviations. The peak is at 5 sigma - the probability of such a peak occurring "anywhere" by chance is tiny (about $3\cdot10^{-7}$ for a five sigma peak); the probability of it occurring exactly "where it was expected" is even smaller.