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Vector boson
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== Explanation == The name ''vector boson'' arises from [[quantum field theory]]. The [[vector component|component]] of such a particle's spin along any axis has the three [[eigenvalue]]s −{{mvar|ħ}}, 0, and +{{mvar|ħ}} (where {{mvar|ħ}} is the [[reduced Planck constant]]), meaning that any measurement of its spin can only yield one of these values. (This is true for [[rest mass|massive]] vector bosons; the situation differs for [[massless particle]]s such as the photon, for reasons beyond the scope of this article. See ''[[Wigner's classification]]''.<ref>{{cite web|url=http://bjps.oxfordjournals.org/content/40/2/287.full.pdf|title=Some Comments Regarding Spin and Relativity|author=Weingard, Robert|author-link=Robert Weingard}}</ref>) The space of spin [[quantum state|states]] therefore is a discrete [[degrees of freedom (physics and chemistry)|degree of freedom]] consisting of three states, the same as the number of components of a [[Euclidean vector|vector]] in three-dimensional space. [[Quantum superposition]]s of these states can be taken such that they transform under [[rotation formalisms in three dimensions|rotations]] just like the spatial components of a rotating vector<ref>{{Cite journal |last1=Franzosi |first1=Diogo Buarque |last2=Gallinaro |first2=Michele |last3=Ruiz |first3=Richard |last4=Aarrestad |first4=Thea K. |last5=Cetorelli |first5=Flavia |last6=Chiesa |first6=Mauro |last7=Costantini |first7=Antonio |last8=Denner |first8=Ansgar |last9=Dittmaier |first9=Stefan |date=2022 |title=Vector boson scattering processes: Status and prospects |journal=Reviews in Physics |volume=8 |doi=10.1016/j.revip.2022.100071 |arxiv=2106.01393 |language=en}}</ref> (the so-called [[representation theory of SU(2)|'''3''' representation of SU(2)]]). If the vector boson is taken to be the [[quantum]] of a field, the field is a [[vector field]], hence the name. The ''boson'' part of the name arises from the [[spin-statistics relation]], which requires that all integer spin particles be bosons.<ref>{{Cite journal |last1=Candemir |first1=N. |last2=Ahmed |first2=F. |date=2023-03-24 |title=Generalized Vector Boson Oscillator in (1+2)-Dimensional Gürses Space-Time |url=https://link.springer.com/article/10.1007/s00601-023-01795-z |journal=Few-Body Systems |language=en |volume=64 |issue=2 |pages=13 |doi=10.1007/s00601-023-01795-z |issn=1432-5411 |url-access=subscription }}</ref>
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