Tag archives: dark matter
By Hamish Johnston
A week or so ago the CDMS experiment in the US reported the detection of three possible dark-matter particles. While that might not sound like much, it is the best evidence yet that dark matter – mysterious stuff that appears to make up one quarter of the mass/energy of the universe – can be detected directly.
But as I said in an earlier blog entry, the detection further muddies the waters in terms of our understanding of exactly what dark matter is. Different experiments say very different things about its possible properties, and now a team of physicists in Denmark, the UK and Switzerland have uploaded a preprint on the arXiv server that tries to make sense of some of this speculation and contradiction.
By Hamish Johnston
Physicists working on the Cryogenic Dark Matter Search (CDMS) may have spotted three dark-matter particles in data from a detector deep beneath the North Woods of Minnesota. The measurement has a statistical significance of about 3σ – which is a long way from the gold standard of 5σ that usually heralds the discovery of a new particle. That said, this result is the best evidence yet that dark matter could be detected directly as it passes through the Earth.
By Michael Banks in Boston
The first results from the $1.5bn Alpha Magnetic Spectrometer (AMS) are expected to be released in the coming two weeks, according to AMS principal investigator Samuel Ting.
Ting, who shared the 1976 Nobel Prize for Physics, was speaking at the 2013 AAAS meeting in Boston.
Artist’s impression of a map of the Quantum Universe (Graphic courtesy of “ILC — form one visual communication”)
By Tushna Commissariat
Here’s a bit of Friday physics fun… I came across this rather interesting image that shows an artist’s impression of a map entitled “The Quantum Universe”. It includes six landmasses all floating in the Big Bang Ocean; including Dark Matter Landmass, Sypersymmetry Reef, Higgs Island and the Land of Ultimate Unification as well as others.
So go ahead and tell us which island you would like to settle down on. Be sure to look carefully at gems like Newton’s Lawn and Mount Einstein before you make your mind up!
To see a larger hi-res image follow this link.