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For many years, atomic spectroscopy allowed the determination of the composition of an element by its electromagnetic spectrum. Every chemical element has a unique `signature' which can be revealed by analyzing the light it gives off. Measuring how…
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On Tuesday, 11 October 2016, the American Physical Society (APS) announced the award of the 2017 W.K.H. Panofsky Prize in Experimental Particle Physics to Michel Della Negra (Imperial College London and, previously, CERN), Peter Jenni (Albert-…
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The expansion of our universe is accelerating, and we don’t understand why. The observational evidence for this is so compelling that its discoverers were awarded the Nobel Prize in 2011, and yet none of our current theories explain how this can be…
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The LHCb collaboration recently published in Nature Physics the first evidence for the violation of the CP symmetry in baryon decays with statistical significance of 3.3 standard deviations (σ). CP violation has been observed in K and B meson decays…
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The W electroweak gauge boson was discovered in 1983 at the CERN SPS collider. Although the properties of the W boson have been studied for more than 30 years, precise measurement of its mass remains a major challenge. Figure: The ATLAS…
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Since neutrinos are charge-less, they cannot be accelerated and steered with magnets as typically done at a particle accelerator. To create a neutrino beam, researchers accelerate charged protons and impinge them onto a fixed target of a few…
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One of the biggest puzzles in physics is that eighty-five percent of the matter in our universe is “dark”: it does not interact with the photons of the conventional electromagnetic force and is therefore invisible to our eyes and telescopes.…
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