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A scalar boson is a boson with spin equal to zero. Some mesons are scalar bosons.
Additional recommended knowledge
The name scalar boson arises from quantum field theory. The component of such a particle's spin along any axis will always be measured to have only one possible value: 0. The space of spin states therefore has one degree of freedom, the same as the number of components of a mathematical scalar. If the scalar boson is taken to be the quantum of a field, the field is a scalar field, hence the name.
Most mesons, such as pion, are pseudoscalar bosons.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Scalar_boson". A list of authors is available in Wikipedia.|