Still no Dark Matter in the latest analysis of LHC data…

Last night the ATLAS Collaboration released its latest search for dark matter and other beyond the standard model theories [1] based on the full dataset from the LHC Run I (2010-2012). By looking for proton-proton collisions where jets of hadronic particles are produced only in one direction (Figure 1), violating conservation of momentum only in appearance, we use ATLAS to search for  weakly interacting massive particles (WIMPs), such as dark matter particles. Because they are weakly interacting, the WIMPs escape ATLAS undetected and lead to what looks like missing momentum. Continue Reading ››

2014: another great year for the Oskar Klein Centre

After six very successful years of OKC leadership, Lars Bergström was asked to become the new Dean of the Mathematics and Physics Section of the Science Faculty of Stockholm University. As a consequence, he has stepped down as OKC director and  a new position at the Department of Physics at Stockholm University has been announced to find a replacement. In the mean time, I will serve as director of the centre. It is with a sense of great pride – and a fair bit of apprehension -  that … Continue Reading ››

Detecting dark matter in the lab with Xenon

In the beginning of November 2014, The Oskar Klein Centre officially joined the XENON dark matter project. The idea is to detect dark matter particles scattering of heavy nuclei.
Since one of the strongest limitation of dark matter detection is due to cosmic ray induced background, it is important to shield the detectors. For this reason XENON is situated in the Gran Sasso National Laboratory, on the side of a ten kilometer long freeway tunnel crossing the Gran Sasso mountain, about 120 km from Rome. Thus, there is about 1500 meters of rock protecting the laboratory from cosmic ray backgrounds.

Do we see dark matter emission from dwarf spheroidal galaxies?

From a dark matter (DM) hunter’s perspective, this year’s Fermi Symposium was highly anticipated. In the six years since the launch of the Large Area Telescope (LAT), we’ve seen our share of ups and downs. An active community, both in and outside the Fermi Collaboration (FC), works hard to fit dark matter to or explain away every deviation in excess of what we expect from the gamma-ray sky. This year’s gathering got the answer to the latest burning question: do we see dark matter emission from dwarf spheroidal galaxies (dSphs)? … Continue Reading ››

New Wallenberg grant to OKC’s Jan Conrad

The Knut & Alice Wallenberg Foundation released yesterday the list of this year’s recipients of funding for research projects with very high potential. We were very happy to see that on this list appears Jan Conrad with the project “Discovering Dark Matter Particles in the Laboratory”, with a grant of SEK 28 883 000 (around 3 MEUR) for five years.

Katie Freese receives big VR grant!

The members of the Oskar Klein Centre had just noticed with satisfaction that we could keep the VR Linnaeus grant at the same level (increased by 10% in 2010) the second half of the grant period (until 2018), when even more exciting news reached us. First, our valued member of the International Advisory Board, Katie Freese from Michigan University, was announced as the new Director of Nordita, which is located in the neighbouring building to OKC. [caption id="attachment_2026" align="alignright" width="218" caption="Katie Freese, New Director of Nordita and recipient … Continue Reading ››