14 July 2012

Questions about the ATLAS 2011 results

This link shows the original 2011 data results from the ATLAS experiment, taken from https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2012-17/


We all recall that the peak was much higher than the expected peak, if the Higgs is at 125 GeV.

In summer 2012, the same 2011 data was analyzed again, when it was known that CMS had also seen something at the energy, and it was graphed as follows: https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2012-091/fig_09a.png

Even though the bump in this reselected 2011 sample looks in a sense less clear than in the original 2011 sample, it now fits much better with the prediction. I was even told that the sigma value of the second graph is higher than that of the first. (Is that so?)

Maybe somebody can explain this? Did I use the correct graphs? Is there some mistake in this post?

Update: This seems to be such a touchy issue that nobody dares to comment, not even anonymously. That is a really bad sign.

8 July 2012

Are ATLAS people serious?

Is this the 5 sigma result of a serious experiment? Nobody in his right mind will agree that the black data points are due to the dotted curve. (Taken from https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2012-091/ )

Bonus question: Are there more points above or below the red line?

Are CMS people serious?

Look at  slide 42 of the CMS presentation of July 4th, shown above. If you manage to see any peak at 126 GeV in any graph that shows the 2012 data, you are really special.

Nobody in his right mind will agree that the black data points are due to the red dotted curve. From this slide, by adding the 2011 data, CMS people deduce the clear peak of page 43. The whole process looks more like magic, less like science. Are these people all dreaming? I do not believe the conclusions by CMS yet. More data is needed.