Nobel week 2015 October 5, 2015Posted by apetrov in Blogroll, Physics, Science.
Tags: physics, precision measurements
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So, once again, the Nobel week is upon us. And one of the topics of conversations for the “water cooler chat” in physics departments around the world is speculations on who (besides the infamous Hungarian “physicist” — sorry for the insider joke, I can elaborate on that if asked) would get the Nobel Prize in physics this year. What is your prediction?
With invention of various metrics for “measuring scientific performance” one can make educated guesses — and even put predictions on the industrial footage — see Thomson Reuters predictions based on a number of citations (they did get the Englert-Higgs prize right, but are almost always off). Or even try your luck with on-line betting (sorry, no link here — I don’t encourage this). So there is a variety of ways to make you interested.
Last chance for a Higgs prediction December 13, 2011Posted by apetrov in Uncategorized.
Tags: cern experiments, fundamental particle, higgs boson, precision measurements
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In a couple of Hours we shall know more than we did before — the CERN experiments, ATLAS and CMS are about to announce their findings about the Higgs boson. In particular, its mass. Why is it interesting? The mass of Higgs, a fundamental particle in the Standard Model (SM) and a manifestation of a Higgs mechanism (discovered by at least five people besides Dr. Peter Higgs), cannot be predicted within the Standard Model. Similarly to masses of quarks and leptons, it comes out from the combination of unknown parameters of the SM.
Yet, Higgs boson would affect precision measurements — its effects could be seen via its quantum effects. So physicists would come out with pictures like the one that accompany this post (from which, incidentally, one can learn that the most likely value of the the Higgs mass given by the minimum of that plot, is already excluded by the direct measurements; what can one say — it’s a tough game).
In principle, Higgs boson mass (or mass of a Higgs-like particle) can be predicted in some models beyond the Standard Model. So, if you have any last-minute predictions, please through your hat in the ring! There are still about two hours before it becomes a “postdiction.” My long-time prediction (as of two years ago) was m_H = 125 +- 5 GeV. What is it based on? A principle that life is tough — the Nature is not always kind to us and we have to work hard to measure what we want to measure. It is true for most measurements/parameters that were studied before, including the most recent study of CP-violation in charm. How scientific is this prediction? I’d say almost as scientific as those based on anthropic principle.
Meanwhile, let’s see what CERN physicists have to say. Tune in here and let’s hope that we don’t overwhelm CERN’s servers.