Professor David Lyth (21 June 1940) is a researcher in particle cosmology at the University of Lancaster.
In 1997, he discovered the Lyth bound which relates the tensor-scalar ratio of perturbations in the CMB to the variation of the inflaton field during inflation.
[2][3] He proposed the Curvaton Scenario in 2001, with David Wands of Portsmouth University.
[1] He was awarded the Fred Hoyle Medal and Prize in 2012.
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