Tensions between the Early and the Late Universe

Coordinators: Adam Riess, Tommaso Treu, and Licia Verde

The standard cosmological model successfully describes observations from widely different epochs of the Universe, from primordial nucleosynthesis all the way to the present day. As the basic cosmological parameters of the model are being determined with increasing and unprecedented precision, it is not guaranteed that the same numerical values for the models’ parameters will continue to fit observations from widely different epochs. Discrepancies between observations at early and late cosmological time, if confirmed at high significance, would require an expansion of the standard model, and may perhaps lead to the discovery of new physics.

We wish to bring together experts on these observations and their interpretation, to assess and quantify existing tensions, to stimulate discussion on their implications, and identify the most promising next steps and opportunities. We envision that this conference will foster close collaboration between theorists and observers.

PLEASE NOTE: There are ample opportunities to present a poster at the Conference. A limited number of poster presenters will be asked to also give a brief contributed talk. If you are interested, please visit the conference website and submit your title and abstract. If you are interested in giving a contributed talk, please add a final sentence to your abstract making the request for consideration. Each poster board is 4 feet high x 6 feet wide. We ask that the posters be no larger than 44 inches high x 34 inches wide at the most (it is important to follow these measurements or posters may be turned down due to limited space). The deadline for abstract submission is May 15.


Invited speakers:

  • Graeme Addison
  • Nabila Aghanim
  • Erik Aver
  • John Blakeslee
  • Anthony Brown
  • Stefano Casertano
  • Tamara Davis
  • Wendy Freedman
  • Sylvia Galli
  • Hendrik Hildebrandt
  • Daniel Holz
  • Insung Jang
  • Lloyd Knox
  • Mariangela Lisanti
  • Lucas Macri
  • Grzegorz Pietrzynski
  • Vivian Poulin
  • Mark Reid
  • Dan Scolnic
  • Adam Riess
  • Tommaso Treu
  • Licia Verde
  • Patricia Whitelock
  • Kimmy Wu