Editing Supergravity (section)

{{Short description|Modern theory of gravitation that combines supersymmetry and general relativity}}
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{{Beyond the Standard Model|expanded=[[Supersymmetry]]}}
{{string theory}}
In [[theoretical physics]], '''supergravity''' ('''supergravity theory'''; '''SUGRA''' for short) is a modern [[field theory (physics)|field theory]] that combines the principles of [[supersymmetry]] and [[general relativity]]; this is in contrast to non-gravitational supersymmetric theories such as the [[Minimal Supersymmetric Standard Model]]. Supergravity is the [[gauge theory]] of local supersymmetry. Since the supersymmetry (SUSY) generators form together with the [[Poincaré algebra]] and [[superalgebra]], called the [[super-Poincaré algebra]], supersymmetry as a gauge theory makes gravity arise in a natural way.<ref name="Niewwenhuizen">{{Cite journal|doi=10.1016/0370-1573(81)90157-5|title=Supergravity|year=1981|last1=Van Nieuwenhuizen|first1=P.|journal=Physics Reports|volume=68|issue=4|pages=189–398|bibcode=1981PhR....68..189V}}</ref>