Graviscalar Explained

\phi comes from a component of the metric tensor g _{55} where the figure 5 labels an additional fifth dimension. The only variations in the scalar field represent variations in the size of the extra dimension. Also, in models with multiple extra dimensions, there exist several such particles. Moreover, in theories with extended supersymmetry, a graviscalar is usually a superpartner of the graviton that behaves as a particle with spin 0. This concept closely relates to the gauged Higgs models.

See also

• Graviphoton (aka gravivector)
• Dilaton
• Kaluza–Klein theory
• Randall–Sundrum models
• Goldberger–Wise mechanism

References

• Roy Maartens, “Brane-World Gravity”, Living Rev. Relativ., 7, (2004), 7. http://www.livingreviews.org/lrr-2004-7, http://www.emis.de/journals/LRG/Articles/lrr-2004-7/download/lrr-2004-7BW.pdf