The announcement of the Nobel Prize in Physics awarded to Takaaki Kajita (Univ. of Tokyo) and Arthur McDonald (Queen’s University, Canada) for the discovery of neutrino oscillations, and thus the revelation that neutrinos have mass, is an exciting occasion for its recognition of fundamental scientific research of the kind done by all of us at the Oskar Klein Centre.
Today’s issue of Science highlights a breakthrough in astroparticle physics many decades in the making. After tantalizing hints in the past year, the IceCube Collaboration now reports on a follow-up analysis, leading to a larger event sample and compelling evidence that the first high-energy neutrinos from outer space are starting to be seen.
Here is just a very brief summary of results that have been presented so far. (For an extensive blog coverage about the event, see this link.)
Unfortunately, Elena Aprile did not present the new results from Xenon100, but she said that they will be presented at a press conference in Gran Sasso in April. It seems that they have new accurate measurements of the efficiency L_eff over a substantial energy range, that of course will be crucial when interpreting the data.
In neutrino physics, the present buzz concerns the possibility of sterile neutrinos, as seems to be mildly preferred by cosmological data.