Geneva, 5 April 2015. After two years of intense maintenance and consolidation, and several months of preparation for restart, the Large Hadron Collider, the most powerful particle accelerator in the world, is back in operation. Today at 10.41am, a proton beam was back in the 27-kilometer ring, followed at 12.27pm by a second beam rotating in the opposite direction. These beams circulated at their injection energy of 450 GeV. Over the coming days, operators will check all systems before increasing energy of the beams.
Latest press releases
Geneva, 17 March 2015. Today during the 50th session of “Rencontres de Moriond” in La Thuile Italy, ATLAS and CMS presented for the first time a combination of their results on the mass of the Higgs boson. The combined mass of the Higgs boson is mH = 125.09 ± 0.24 (0.21 stat. ± 0.11 syst.) GeV, which corresponds to a measurement precision of better than 0.2%. The Higgs boson is an essential ingredient of the Standard Model of particle physics, the theory that describes elementary particles and their interactions.
Geneva, 16 March 2015. CERN1 will be hosting the next CineGlobe International Film Festival on 24 – 29 March. For its fifth edition, CineGlobe celebrates the theme of ‘Convergence’. This theme embraces the meeting of minds, methods and meaning of our times.
“The festival is about the convergence of art, cinema and science. This year, CineGlobe witnesses how science is changing the way we tell stories in art and cinema”, says Neal Hartmann, the festival’s director.
Geneva, 11 February 2015. In a paper published yesterday in the journal Physical Review Letters, the COMPASS experiment at CERN1 reports a key measurement on the strong interaction. The strong interaction binds quarks into protons and neutrons, and protons and neutrons into the nuclei of all the elements from which matter is built. Inside those nuclei, particles called pions made up of a quark and an antiquark mediate the interaction. Strong interaction theory makes a precise prediction on the polarisability of pions – the degree to which their shape can be stretched.
Geneva 19 December 2014. CERN1 Director General, Rolf Heuer, and the Chairman of the Pakistan Atomic Energy Commission, Ansar Parvez, signed today in Islamabad, in presence of Prime Minister Nawaz Sharif, a document admitting the Islamic Republic of Pakistan to CERN Associate Membership, subject to ratification by the Government of Pakistan.