SAIFR/Princípia 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

Plenary talks:

  • Carlos R. Argüelles (La Plata National University & CONICET): Dark matter in the Milky Way: from SgrA* to the entire halo
  • Kimberly Boddy (University of Texas at Austin, USA): Cosmological constraints on Dark Matter
  • Enrico Bertuzzo (USP, Brazil): Inelastic dark states at the lifetime frontier
  • Thomas Hambye (Université Libre de Bruxelles, Belgium): Domain of Thermal Dark Matter
  • Manfred Lindner (Max Planck Institute for Nuclear Physics – MPIK, Germany): Direct Dark Matter Detection& New XENONnT Results
  • Diego Restrepo (University of Antioquia, Colombia): Dirac dar matter, neutrino masses, and dark baryogenesis
  • Josh Ruderman (New York University, USA): Light Dark Sectors
  • Philip Tanedo (UC Riverside, USA): Dark matter in compact objects
  • Andrea Tesi (INFN, Italy): Dark dark sectors
  • Aion Viana (IFSC-USP, Brazil): Indirect dark matter searches with high-energy electromagnetic probes
  • Liantao Wang (University of Chicago, USA): Conformal freeze in, asymmetric reheating, and dark photon
  • Carlos Yaguna (UPTC Tunja, Colombia): Two-component dark matter from a Z_4 symmetry

Contributed talks:

  • Pedro Bittar (IFUSP, Brazil): Asymmetric Dark Matter in the Z2 preserving Twin Higgs
  • Álvaro Santos de Jesus (II-P/UFRN, Brazil): Search for Dark Sector by Repurposing the UVX Brazilian Synchrotron
  • Jacinto Paulo Neto (II-P/UFRN, Brazil): Early matter domination and production of dark matter
  • Peter Reimitz (IFUSP, Brazil): Light Vector Mediators and DM
  • Michael Shamma (TRIUMF, Canada): Cogenesis and (Nearly) Degenerate Dark Sectors
  • Dêivid Silva (UFPB, Brazil): Using dark matter to solve the  H_0 problem
  • Yiming Zhong (University of Chicago, USA): Collapsed dark matter halo
  • Gabriel Brandao de Gracia (IFT-UNESP, Brazil):ELKO SPINOR AS DARK MATTER? A theoretical framework for a future LAB detection


  • Patricio Escalona Contreras (Universidad Técnica Federico Santa María, Chile): Fermion Singlet Dark Matter in a Pseudoscalar Dark Matter Portal
  • Ana Luisa Foguel (IFUSP, Brazil): A Robust Description of Hadronic Decays in Light Vector Mediator Models
  • Luis Eduardo Funo de Moura França (IFUSP, Brazil): Search for solar dark photons and axions by the annual modulation method in the COSINE-100 experiment
  • Andrés Felipe Gómez (EIA University, Colombia): Searching Dark Matter with Machine Leaning Techniques
  • Pablo Pais Hirigoyen (Universidad Austral de Chile (UACh)): The dark sector window with extreme laser pulses
  • Marcos Vinicius dos Santos (UNICAMP, Brazil): On the impact of ultra-light mediators for neutrino flavor evolution in Supernovae



Online registration is now closed



Workshop program: PDF updated on November 2, 2022



SAIFR/Princípia Workshop on the Nature of Dark Matter

Additional Information

Registration: ALL participants should register. The registration will be on November 02 (Monday) at the Principia institute,  from 08:30 am to 09:15 am.

BOARDING PASS: All participants, whose travel has been provided or will be reimbursed by the institute, should bring the boarding pass upon registration. The return boarding pass (PDF, if online check-in, scan or picture, if physical) should be sent to by e-mail .

List of Participants: Updated on November 03, 2022

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. To enter the IFT-UNESP building, you may be required to show a Covid vaccination certificate.

BOARDING PASS: All participants, whose travel has been provided or will be reimbursed by ICTP-SAIFR, should bring the boarding pass  upon registration. The return boarding pass (PDF, if online check-in, scan or picture, if physical) should be sent to by e-mail.

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 m (width) x 1,5 m (length). 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 workshop 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.