ATLAS Experiment searches for new symmetries of nature

The fundamental forces of nature are intimately related to corresponding symmetries. For example, the properties of electromagnetic interactions (or force) can be derived by requiring the theory that describes it to remain ...

ATLAS Experiment measures the 'beauty' of the Higgs boson

Two years ago, the Higgs boson was observed decaying to a pair of beauty quarks (H→bb), moving its study from the "discovery era" to the "measurement era." By measuring the properties of the Higgs boson and comparing them ...

New result in hunt for mysterious magnetic monopoles

Cutting a magnet in half yields two magnets, each with its own north and south pole. This apparent absence of an isolated magnetic pole, or "magnetic monopole," has puzzled physicists for more than a century. It would seem ...

Quarks observed to interact via minuscule 'weak lightsabers'

Two among the rarest processes probed so far at the Large Hadron Collider, the scattering between W and Z bosons emitted by quarks in proton-proton collisions, have been established by the ATLAS experiment at CERN.

Probing dark matter with the Higgs boson

Visible matter—everything from pollen to stars and galaxies—accounts for roughly 15% of the total mass of the universe. The remaining 85% is made of something entirely different from things we can touch and see: dark ...

ATLAS experiment observes light scattering off light

Light-by-light scattering is a very rare phenomenon in which two photons interact, producing another pair of photons. This process was among the earliest predictions of quantum electrodynamics (QED), the quantum theory of ...

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