Magazine

Like Wassily Kandinsky’s geometric constructivism at the Bauhaus, future collider proposals are a harmony of lines, arcs and circles. This edition of the Courier reports on a comparative assessment of seven vying to be CERN’s future flagship collider, as well as exploring what the High-Luminosity LHC will be able to achieve before it begins. Last but not least, we offer in-depth analysis of one of the most compelling ideas in physics: the QCD axion.