Inspired by my friend Peter Woit's openness in discussing his work in progress
(a thick textbook on the foundations of quantum mechanics), I feel compelled to come out here about my own project.
I'm speaking of bare particles. "Heroes" is maybe too pathetic, but
"bricks" would be OK since everything is made of them despite their
being non-observable. Why are they non-observable? Because they are
non-interacting particles or particles "before interaction".
Inaccessible, for short.
Just a quick link to allow you to browse a very nice set of pictures taken at CERN by Andri Pol. The subjects are physicists in their daily activities - brainstorming at the blackboard, cycling around the lab, bitching about the mess in the common coffee room, or working at various pieces of hardware:
you can see them here
Last Tuesday I was in Mantova, a pleasant little town in northern Italy, rich of monuments and treasures like the Palazzo Ducale, which hosts a vast collection of paintings and frescoes from reinassance artists. But I was not there for a private visit; I was in fact invited to comment and provide answers to questions that the audience of a movie, "The Hunt for the Higgs", were invited to ask after seeing it.
The host of the event was the "Cinema del Carbone", a small movie theater near the center of the town. The organizers called me there because they knew me from my previous participation to last years' Festivaletteratura, a literature festival which takes place yearly in September, where authors of books and other media get in touch with their public.
"We haven't the foggiest idea what drives the new high-temperature
superconductors, or what makes a snowflake, or how the mind or the
economy works. What is more, nothing high energy physics can do will ever be of the slightest direct help in solving these overwhelmingly hard problems"Philip Anderson, The Case Against the SSC, 1987
(Anderson was one of the theorists who are credited for discovering the "Higgs mechanism" in the early 1960s. He is a 1977 Nobel laureate in Physics for his studies of the electron structure of magnetic systems)
The top quark is the most massive elementary particle that we have so far discovered at particle accelerators. One usually describes this by saying that the top mass is about 185 times larger than the mass of a whole proton; but since the proton is a composite object, it is not the best comparison stone; I would prefer to compare the top mass to the mass of the lightest quark, which we only roughly know to be in the range of a 2 to 5 MeV. Then one gets a more dramatic picture: the up quark and the top quark are both elementary particles, but the latter is 50,000 times larger than the former. Can that be true ?
I may today perhaps make the boldest claim I ever made, at least many will think so, and I am not known for my humbleness (though I should be – how many established scientists do see themselves as merely a perverted, psychopathic robot?): The world’s first ever touchable, functioning quantum many-worlds model that can violate John Bell’s inequality even stronger than standard quantum mechanics!
In a paper appeared a few days ago on the Cornell Arxiv
Campbell, Ellis and Williams discuss how the LHC experiments have a chance to obtain information on the Higgs boson width by studying four-lepton events at masses much above the 126 GeV region where they cluster when produced by Higgs boson decays. Here I am going to show the graph that is at the source of this idea, and the general conclusions that the theorists reach on the precision that ATLAS and CMS can obtain on that parameter.
First of all let me explain to outsiders what is the Higgs boson width. In order to do so I need to make a short digression.