standard model

American  

noun

Physics.

1. a mathematical description of the elementary particles of matter and the fundamental forces by which they interact and behave; a model combining electromagnetic and weak forces.

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standard model British  

noun

1. physics a theory of fundamental interactions in which the electromagnetic, weak, and strong interactions are described in terms of the exchange of virtual particles

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standard model Scientific  

1. A theory of subatomic particles and their interactions. The standard model is a kind of quantum field theory and states that all matter consists of three types of particles: leptons, quarks, and the gauge bosons (gluons, intermediate vector bosons, and photons), which are responsible for the strong, weak, and electromagnetic forces, along with the more controversial Higgs boson. The standard model was first formulated in the 1970s and was tested repeatedly in the 1980s. It correctly predicted the existence and properties of W and Z bosons. It does not, however, unify all forces, since it does not include an explanation of gravity; a boson called the graviton that might be the mediator of gravity has not been found and cannot be accounted for in the model.

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standard model Cultural  

1. The best theory of the ultimate nature of matter available today. In this theory, all matter is made from quarks and leptons. Particles interact with each other through the medium of the strong force, the electromagnetic force, the weak force, and the gravitational force. At high temperature, the theory sees the first three of these forces as an example of a single unified force.

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The standard model describes the early evolution of the big bang.

The standard model is a unified field theory.

Example Sentences

"If this is correct, to the extent of my knowledge, it would mark the first time humanity has 'seen' dark matter. And it turns out that dark matter is a new particle not included in the current standard model of particle physics. This signifies a major development in astronomy and physics," said Totani.

From Science Daily

A research team led by astrophysicist Lukas Böhme at Bielefeld University has now found new answers, ones that challenge the established standard model of cosmology.

From Science Daily

The Standard Model of particle physics contains the equations needed to describe these phenomena, but in many real situations such as fast-changing environments or extremely dense matter, those equations become too complex for even the most advanced classical supercomputers to handle.

From Science Daily

Their test focuses on the strong interactions described by the Standard Model.

From Science Daily

By comparing the DDE model with fixed parameters to the standard model, they were able to isolate the effects of a changing dark energy component.

From Science Daily