Workshop on the Nature of Dark Matter

November 2-4, 2022 

ICTP-SAIFR, São Paulo, Brazil

Principia Institute


The existence of dark matter has been established beyond any reasonable doubt by several observations at vastly different length scales. These include rotation curves of galaxies, weak and strong gravitational lensing, fluctuations in the cosmic microwave background, baryonic acoustic oscillations, and formation of structure in the universe. All we know about dark matter comes from its gravitational effects, and these observations tell us nothing about its microscopic nature and composition. Understanding the origin of dark matter is at the forefront of the observed phenomena that we cannot explain.

Although we do not know the particle nature of dark matter, we have collected enough data to definitively exclude a broad range of possibilities. First of all, we precisely know that dark matter currently constitutes 27% of the universe’s energy budget. Furthermore, it is mostly cold and massive, it is non-baryonic with suppressed (or vanishing) couplings to the strong and electroweak gauge groups, and it does not interact appreciably with itself. Collectively, these observational facts exclude the possibility that known particles could account for these data. Thus, unveiling its identity and non-gravitational properties is one of the most important questions in fundamental physics today.

This  workshop will cover interdisciplinary aspects of the experimental searches for dark matter and it will outline the viable models. We will devote special attention to those that involve non-standard production mechanisms as they allow dark  matter particles to be very light. Such light candidates require new detection strategies and have implications in cosmology and structure formation that we aim to address in the workshop. We expect that the workshop will establish an effective strategy for the exploration and identification of the dark matter particle representing an important step in the hunt for this unknown and elusive degree of freedom.

There is no registration fee.


  • Regina Caputo (NASA, USA)
  • Francesco D’Eramo (Padua University, Italy)
  • Gordan Krnjaic (Chicago University, USA)
  • Farinaldo Queiroz (UFRN, Brazil)

Confirmed Speakers

  • Enrico Bertuzzo (USP, Brazil)
  • Thomas Hambye (Université Libre de Bruxelles, Belgium)
  • Manfred Lindner (Max Planck Institute for Nuclear Physics – MPIK, Germany)
  • Diego Restrepo (University of Antioquia, Colombia)
  • Josh Ruderman (New York University, USA)
  • Tim Tait (UC Irvine, USA)
  • Flip Tanedo (UC Riverside, USA)
  • Andrea Tesi (INFN, Italy)
  • Aion Viana (IFSC-USP, Brazil)
  • Liantao Wang (University of Chicago, USA)
  • Carlos Yaguna (UPTC Tunja, Colombia)




Online registration is now closed




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Additional Information

COVID-19: Fully vaccinated Brazilians and foreigners are now exempt from presenting proof of a COVID-19 test with a negative or non-detectable result. You are only required to present proof of vaccination, printed or electronically. See requirements for travelling to Brazil at To enter the IFT-UNESP building, you may be required to show a Covid vaccination certificate.

Visa information: Nationals from several countries in Latin America and Europe, Australia, Canada, Japan and USA are exempt from tourist visa. Please check here which nationals need a tourist visa to enter Brazil.

Poster presentation: Participants who are presenting a poster MUST BRING A BANNER PRINTED. The banner size should be at most 1,5m x 1m. We do not accept A4 or A3 paper. Click here to see what a banner looks like:

Hotel recommendation: Participants and Speakers whose accommodation will be provided by the institute will stay at The Universe Flat.

How to reach the Principia Institute: The program will be held at Principia Institute of the Institute for Theoretical Physics Foundation, located at Rua Pamplona, 145,  50 meters away from the hotel Universe Flat.