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I would guess there are many more than thousands of such experiments that have been run, testing all the various permutations of dozens (or more) of different b
by DavidSJ 6y ago
I would guess there are many more than thousands of such experiments that have been run, testing all the various permutations of dozens (or more) of different beyond Standard Model physical theories.
- dukwon 6y agoTesting different models is done in the analysis of the data, not in running the experiment differently. The "experiment" (colliding protons together) has been repeated quadrillions of times at the LHC. But there are only a few parameters you can change about it, namely the energy and how focused the beams are. Altering the detectors to change/improve how data is collected is an expensive and slow process.
- DavidSJ 6y agoFair enough; what I meant is "multiple testing" in the context of a single overarching experiment, which is I believe what the comment I was replying to was getting at as well.
- davrosthedalek 6y agoIn any case, you have a point. Whether multiple analysis, multiple channels or multiple experiments, you have a look-elsewhere effect, and that can easily knock off one or two sigmas. If you look at a 10000 possibilities, you will a couple with 3 sigma difference, just by chance. LHC looks at MANY possibilities. For a while, they tried to keep track to quantify the look-elsewhere effect. I think they have given up on that.