HIGGS AND ENGLERT!
Note: this article is being updated in real time as events unfold... Updates are at the bottom. Note in particular the 12.05 update...!
It bugs me a little when 'time' is randomly called a dimension in casual talk. Since just after Einstein's relativity, we've been treated to the mathematical idea that time is its own dimension - though Einstein never said that.
Just a small post to mention the recent activity in my Greek blog, where with the help of a very kind Greek student we are offering a selection of articles translated in Greek language.
Here are the latest additions:
Most stories on the so called "accelerator on a chip" either fail to mention or deeply bury an important detail. This device needs to be primed by a conventional accelerator. In doing so, they give the wrong impression of what has been developed.
First, this is an important advance in accelerator physics and a really cool example of what can be done with the creative use of common scientific apparatus and materials. It is advances like this that will make next generation high energy physics affordable.
With that out of the way....
In 1963, Roy Kerr's hypothesis was of a "clean" black hole model and that remains the dominant paradigm. From theory to reality things may be quite different, black holes may be much "dirtier" than what Kerr believed, the authors write.
A few days ago I posted the results of a poll
ran on 50 or so participants to a workshop on the Higgs boson in Madrid. The poll
consisted of six questions on the expectations one had on the possibility of new discoveries by present-day accelerators, as well as on the nature of the underlying theory of fundamental interactions, and on the nature of dark matter.
UPDATE: Just found out that Peter Woit anticipated me on this - see his blog entry
Just five years ago, on the eve of the start of the Large Hadron Collider, most particle physicists - experimentalists and theorists alike - would have been willing to bet their left testicle or ovary on the fact that new physics would very soon be discovered, most likely Supersymmetric particles (if a suitable payoff had been offered in exchange).
I have reported about the studies of resonances in the decays of the B+ meson by CDF, CMS, and LHCb a few times in the recent past. The situation, in a nutshell, was the following until yesterday: CDF found a new particle, the Y(4140), as a resonant (J/ψ φ) intermediate state produced when B+ mesons decay into a J/ψ, a φ, and a positive kaon; CDF also saw some evidence for a further excitation of the same two-body system; CMS confirmed the CDF claims, finding observation-level significance for both states; and LHCb did not confirm either of the two.
Furthermore Belle, a B-factory experiment studying electron-positron collisions, also found no evidence for the Y(4140) state.
The ATLAS Collaboration published last week
the results of a search for dark matter particles produced in association with a W or Z boson by the 8-TeV proton-proton collisions collected during the 2012 run of the Large Hadron Collider. The search uses techniques similar to ones I have described in recent articles here discussing results of the CMS experiments on different new physics signatures, and I thought it would be interesting to review it here.
How to present in a simple way the spinorial space-time and the privileged space direction it generates? What is the fundamental difference between space-time spinors and the conventional description of space and time? What is the relevance for the analysis of WMAP and Planck data ?