Briefs: LHC is thriving

In November 2009, CERN announced that the LHC was operating again, after the malfunction that led to a halt in September 2008. Experiments have since been performed at up to unprecedented levels of 7 TeV (3.5 TeV per beam). In early November 2010, all the objectives of the experimental teams for 2010 for the first year of proton physics activities were achieved and the transition to lead and other heavy-ion studies was completed soon after. To give a few examples, since it resumed operation, the LHC has made it possible to observe particles of antimatter (in the form of antihydrogen particles) and for the first time, a neutrino "chameleon": a muon particle, which turned into a tau particle, in a muon neutrino beam.