Gravitational Waves meet Amplitudes in the Southern Hemisphere

August 14 – September 1, 2023

ICTP-SAIFR, São Paulo, Brazil

Principia Institute


The central theme of the program will be the application of particle physics methods to the calculation of processes relevant to gravitational-wave phenomenology.

We intend to bring together both experts and younger theorists from three distinct communities:

– Classical General Relativity, including both analytic and numerical approaches;

– Effective Field Theories;

– Scattering Amplitudes.

We also want to bring theorists into contact with observers and analysis specialists from LIGO-Virgo-KAGRA.

We intend to have one talk a day, with lots of time available for informal discussions and collaboration. The building hosting the program is brand new with comfortable discussion areas, right next to the intended hotel in the tourist center of São Paulo. We hope to have fifteen to twenty people in residence each week.

This activity will be preceded by the School on Modern Amplitude Methods for Gauge and Gravity Theories. Selected students attending the school have the option of remaining as observers.

There is no registration fee.


  • Fernando Febres Cordero (Florida State University, USA)
  • David Kosower (Université Paris–Saclay, France)
  • Patricia Schmidt (University of Birmingham, UK)
  • Riccardo Sturani (ICTP-SAIFR/IFT-UNESP, Brazil)

Satisfaction survey: HERE

Confirmed Invited Participants

  • Fabian Bautista (IPhT Saclay, France): Higher spins, the Teukolsky equation and super extrema Kerr Binary Systems
  • Collin Capano (UMass at Dartmouth, USA): Observational evidence for quasi-normal modes from astrophysical black holes
  • John Joseph Carrasco (Northwestern University, USA): From scattering to expansion, effective gravitational predictions via double-copy
  • Fernando Febres Cordero (Florida State University, USA): Numerical Techniques for Gravity Scattering Amplitudes
  • Leonardo de la Cruz (IPhT Saclay, France): Classical off-shell currents
  • Stefano Foffa (University of Geneva, Switzerland): Towards 5PN determination of conservative binary dynamics
  • Riccardo Gonzo (University of Edinburgh, UK): From classical scattering amplitudes to bound state observables
  • Maria Haney (NIKHEF – Amsterdam, the Netherlands): Waveform modeling for GW data analysis (1)
  • Manfred Kraus (Mexico University, Mexico): Spinning Black Holes from multi-loop Scattering Amplitudes
  • David Kosower (Université Paris–Saclay, France): Finite and Evanescent Feynman Integrals
  • Luis Lehner (Perimeter Institute, Canada): Beyond General Relativity and the strongly gravitating/dynamical regime
  • Oliver Long (Max Planck Institute-Potsdam, Germany): Self-force meets post-Minkowskian in the scattering regime
  • Raissa Mendes (UFF, Brazil): Effective action models for dynamical scalarization
  • Guilherme Pimentel (Scuola Normale Superiore – Pisa, Italy): The emergence of time in cosmological correlations
  • Adam Pound (University of Southampton, UK): Progress in gravitational self-force theory: recent advances in the small-mass-ratio limit
  • Geraint Pratten (University of Birmingham, UK): Waveform modeling for GW data analysis (2)
  • Patricia Schmidt (University of Birmingham, UK): Data analysis: hands-on session
  • Riccardo Sturani (ICTP-SAIFR/IFT-UNESP, Brazil): NRGR for the two-body problem: an overview
  • Justin Vines (MPI for Gravitational Physics, Germany): Scattering amplitudes for spinning black holes
  • Mao Zeng (University of Edinburgh, UK): Scattering amplitudes and the gravitational two-body problem
  • Aaron Zimmermann (University of Texas – Austin, USA): Introduction to Gravitational Wave Data Analysis

List of Participants: Updated on August 13, 2023



Online registration is now closed



Download program: updated – August 24

Videos and Files

2023-08-14 2023-08-15 2023-08-16 2023-08-17 2023-08-21 2023-08-22 2023-08-23 2023-08-24 2023-08-25 2023-08-28 2023-08-29 2023-08-30 2023-08-31 2023-09-04
  • 14:00 - Stefano Foffa (U. of Geneva): Detecting the cosmic dipole with gravitational waves




Gravitational Waves meet Amplitudes in the Southern Hemisphere

Additional Information

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.

COVID-19: Fully vaccinated Brazilians and foreigners are required to present proof of vaccination, printed or electronically before boarding an international flight. Not vaccinated and not fully vaccinated passengers have to present a medical certificate with a negative test result before entering the country. Tests should be taken up to 24 hours before boarding.

Visa information: Nationals from several countries in Latin America and Europe are exempt from tourist visa. Nationals from Australia, Canada, Japan and USA are exempt from tourist visa until October 1st, 2023. Please check here which nationals need a tourist visa to enter Brazil.

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 uphill from the hotel Universe Flat.