KYUDAI NEWS KYUSHU UNIVERSITY CAMPUS MAGAZINE Spring 2013 No.24

19/32

the foundation of the experimental particle physics laboratory, the researchers from the ATLAS experiment gathered together and formed a new research team. Kyushu University officially became a participant in the ATLAS experiment in February, 2012. Till date, the Standard Model has successfully explained many experimental results in particle physics. However, the Higgs boson, which is predicted by the Standard Model to give mass to matter, had long been undiscovered despite tremendous effort. Since the discovery in July 2012 of a new particle that is believed to be the Higgs boson, the ATLAS experiment has drawn attention. The particle was discovered by colliding protons at a center-of-mass energy of 7 to 8 TeV and by analyzing the data produced by these collisions. In addition, through future experiments, we expect to explore the physics beyond the Standard Model, such as supersymmetry or an extra dimension beyond the four dimensions of space-time. Two researchers from Kyushu University work at CERN, operating and collecting data from the Silicon-Strip Tracking Detector (one of the ATLAS detectors). Kyushu University also contributed to the abovementioned discovery of the new particle, believed to be the Higgs boson, by analyzing data and focusing on the characteristic pattern of the new particle that decays into a pair of Z bosons, each of which decays into a pair of leptons (electrons or muons) (*2). By 2015, the LHC should achieve a center-of-mass energy of 13 to 14 TeV, which is the original design goal. Over the next ten years, we plan to increase the luminosity of the proton beams, and upgrade the ATLAS detectors accordingly. The Kyushu University research team will continue to operate and collect data from the ATLAS detector and will also develop a new detector for the planned upgrade. In addition, researchers at the Kyushu University will continue to investigate the properties of the new particle in an effort to confirm whether it is the Higgs boson of the Standard Model, or to suggest new physics beyond the Standard Model. The future of particle physics at the frontier of interaction energies is being pursued at Kyushu University.18Kyudai News No.24 Kyushu University*1 ATLAS detector*2 Potential Higgs boson detected in the ATLAS experiment

※このページを正しく表示するにはFlashPlayer9以上が必要です