Posted by mattusmaximus on September 22, 2012
While at Dragon*Con 2012, I gave an incredibly well-attended lecture (standing room only!) on the recent “discovery”(?) of the Higgs boson and our modern theories of particle physics (known as the Standard Model). The lecture was followed by a very fruitful Q&A session which was made all the more interesting because attending the lecture was an engineer who actually works on a detector at the Large Hadron Collider and a theoretical particle physicist!
I recorded the audio of the lecture in order to share it, and I have embedded that audio into the PowerPoint file I used for my lecture. Enjoy! :)
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Posted by mattusmaximus on December 14, 2011
You may have heard the recent news that physicists at CERN’s Large Hadron Collider may be narrowing their search for the Higgs Boson. Here’s an update from The Guardian…
A graphic showing traces of collision of particles at Cern. Photograph: Fabrice Coffrini/AFP/Getty Images
Scientists believe they may have caught their first glimpse of the Higgs boson, the so-called God particle that is thought to underpin the subatomic workings of nature.
Physicists Fabiola Gianotti and Guido Tonelli were applauded by hundreds of scientists yesterday as they revealed evidence for the particle amid the debris of hundreds of trillions of proton collisions inside the Large Hadron Collider at Cern, the European particle physics laboratory near Geneva. …
Let me just put a few things into perspective here on this potential (and I stress potential) discovery. First, the data are rather preliminary, and in order to say for sure that there is solid evidence for the Higgs Boson, there need to be more observations to help shore up the statistical analysis. In particle physics, it is not uncommon to see the occasional “discovery” that eventually ends up being merely a statistical anomaly, so more data is better to weed out the anomalies. This section of The Guardian article helps to clarify this point:
… Particle physicists use a “sigma” scale to grade the significance of results, from one to five. One and two sigma results are unreliable because they come and go with statistical fluctuations in the data. A three sigma result counts as an “observation”, while a five sigma result is enough to claim an official discovery. There is less than a one in a million chance of a five sigma result being a statistical fluke.
Gianotti and Tonelli led two separate teams – one using Cern’s Atlas detector, the other using the laboratory’s Compact Muon Solenoid. At their seminar yesterday one team reported a 2.3 sigma bump in their data that could be a Higgs boson weighing 126GeV, while the other reported a 1.9 sigma Higgs signal at a mass of around 124GeV. There is a 1% chance that the Atlas result could be due to a random fluctuation in the data. …
So, by these data, while the 2.3 and 1.9 sigma signals are interesting, they don’t really rise to the level of a solid observation (which, recall, is set at a standard of 3.0 sigma), much less an official discovery.
Also, by “narrowed the search” for the Higgs Boson, what the CERN physicists mean is that they may have narrowed down the energy range in which the Higgs Boson might exist. So, long story short, while these results are of interest, don’t go popping those champagne corks just yet :)
The “God Particle”?
I don’t know about you, but I get kind of annoyed at all of this labeling of the hypothetical Higgs Boson as the “God Particle”. I see it as the kind of mushing of religion into science that leads to all manner of philosophically-challenged kind of muddy thinking. First off, depending upon how one defines God (assuming the standard monotheistic version of the Abrahamic god), which is usually defined as a supernatural being, you run into trouble by trying to find natural evidence for a thing which is supposed to be beyond nature.
Second, even if we did discover the Higgs Boson, what would that supposedly tell us about this God? Presumably various armchair theologians argue that such a discovery would be evidence for their view of God (which also begs the question of whether or not it is evidence for one God versus another God). The logic here simply escapes me, and it smacks of the usual “everything is evidence for God” kind of argumentation that passes the lips of too many religious people. And this also brings up a potentially sticky question for the advocates of the “God Particle” label…
What if the Higgs Boson isn’t discovered, despite years of detailed searching? Will these same armchair theologians suddenly give up their belief in their God because the supposed “Particle” which is his/her/its/their fingerprint upon the cosmos was never there to begin with? Somehow I don’t think so, because these believers will merely rationalize away the lack of evidence for the “God Particle”. It is in this sense that I find some people who try to stick the round peg of religion into the square hole of science to be particularly annoying: they want to use science as a method of “proving” their religious beliefs when they think it will work for them, yet they completely dismiss science when it works against them. It’s simply “heads I win, tails you lose” argumentation, and it is both intellectually lazy and disingenuous.
What if we don’t find the Higgs Boson? Science will march on…
This is the thing I really like about science: it never ends. The process of scientific investigation never ceases to ask questions, formulate ideas, and test out those ideas. I think it is entirely possible that in the search for the Higgs Boson, it will never be found; and what then? What if we never find it? Well, that’s when I think things will get really interesting, because that means that much of what we think we know about the Standard Model of physics could very well be wrong. And that would mean that we need to start looking at things differently; this is, to me, the antithesis of dogmatic thinking, and it shows how science is, collectively, the best mechanism we have for stimulating open and free inquiry of the world around us.
Now don’t get me wrong – I would be quite excited if the Higgs Boson were discovered. But I think I would be much more excited if it weren’t found. That would certainly open up a lot more questions, wouldn’t it?
To science! May it march ever onward…
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