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Apr 14, 2023

The ATLAS collaboration observes the electroweak production of two jets and a Z-boson pair

Posted by in category: particle physics

The ATLAS collaboration, the large research consortium involved in analyzing data collected by the ATLAS particle collider at CERN, recently observed the electroweak production of two Z bosons and two jets. This crucial observation, presented in Nature Physics, could greatly contribute to the understanding of standard model ℠ particle physics.

The SM of is a well-established theory describing the building blocks and fundamental forces in the universe. This model describes weak bosons (i.e., bosons responsible for the so-called ‘weak force’) as mediators of the electroweak interaction.

The scattering of massive weak bosons, such as W and Z bosons, is constrained specifically to interactions, where the mediators directly interact and scatter off each other. This scattering, also known as vector-boson scattering (VBS), also involves a type of Feynman diagrams or vertices known (i.e., quartic gauge vertices) that physicists have so far been unable to experimentally probe through other .

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