= Lisa Randall
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{tag=Physicist}
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<Lisa Randall> co-developed a geometric approach to the <hierarchy problem> with <Raman Sundrum>. Their <Randall–Sundrum model> uses a slice of five-dimensional <Anti-de Sitter spacetime>; its varying <spacetime metric> converts a fundamental large scale into a much smaller scale on the brane containing <Standard Model> fields. The mechanism relies on warping rather than an enormous compactification volume. It illustrates how assumptions about inaccessible spatial geometry can imply measurable particle excitations.<A Large Mass Hierarchy from a Small Extra Dimension by Lisa Randall and Raman Sundrum>[1999 abstract: warped background geometry and phenomenological distinction from large extra dimensions]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Lisa%20randall%20by%20christopher%20michel%2002.jpg?width=250]
{title=Portrait of <Lisa Randall>}
{description=Christopher Michel, 27 March 2015. https://creativecommons.org/licenses/by-sa/4.0/[CC BY-SA 4.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Lisa_randall_by_christopher_michel_02.jpg}
{width=250}
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