David H. Lyth

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Professor David Lyth (21 June 1940) is a researcher in particle cosmology at the University of Lancaster. He has published over 165 papers as well as two books on early universe cosmology and cosmological inflation. [1]



He is noted for his work in the area of inflation model building and the observational consequences of models of inflation. In 1997, he discovered the Lyth bound which relates the tensor-scalar ratio of perturbations in the CMB to the variation of the inflation 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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  1. 1 2 http://davidhlyth.co.uk
  2. Easther, Richard; Kinney, William H.; Powell, Brian A. (2006). "The Lyth Bound and the end of inflation". Journal of Cosmology and Astroparticle Physics. 2006 (8): 004. doi:10.1088/1475-7516/2006/08/004.
  3. Efstathiou, George; Mack, Katherine J. (2005). "The Lyth bound revisited". Journal of Cosmology and Astroparticle Physics. 2005 (5): 008. arXiv: astro-ph/0503360 . doi:10.1088/1475-7516/2005/05/008.