The Preparatory Group was established with the main purpose of preparing the guidelines and receiving white papers from the different efforts in High Energy Physics, AstroParticles and Cosmology in the region. The white papers  are the basis for mapping a landscape of initiatives in the region. The Preparatory Group is also in charge of organizing Workshops  to discuss the contributions and to prepare the Physics Briefing Book for the Strategy Group.

The initial members of the  Preparatory Group were nominated by the countries representatives in the SILAFAE International Scientific Committee.
  • Members of the Preparatory Group (January 2025- December 2027)
Argentina
Diana López Nacir (co-chair)
Cosmology
Instituto de Física de Buenos Aires (IFBA) and CONICET
Belén Andrada
AstroParticles
Comisión Nacional de Energía Atómica (CNEA) - Buenos Aires
Fernando Monticelli
HEP-EXP (ATLAS)
Universidad Nacional de La Plata

Bolivia
Martín Subieta
AstroParticles
Universidad Mayor de San Andrés - La Paz

Brazil
Sandro Fonseca
HEP-EX (CMS)
Rio de Janeiro State University (UERJ)
Farinaldo Queiroz
AstroParticle and Particle Physics 
International Institute for Physics & Federal University of Rio Grande do Norte
Rogerio Rosenfeld (Chair)
Cosmology (DES, LSST)
Instituto de Física Teórica-UNESP & ICTP-SAIFR

Chile
Alfonso Zerwekh
HEP-PH
Universidad Técnica Federico Santa Maria (UTFSM) - Valparaíso
Mauro Cambiaso
HEP-TH
Universidad Andrés Bello - Santiago

Colombia
Mario Acero
HEP-EXP (NOvA, DUNE)
Universidad del Atlántico
Deywis Moreno
HEP-EXP (DUNE)
Universidad Antonio Nariño

Costa Rica
Esteban Jimenez Moya
Universidad de Costa Rica

Ecuador
Edgar Carrera
HEP-EX (CMS)
Universidad San Francisco de Quito (USFQ)
Andrés Baquero Larriva 
HEP-EX (CTA and LST)
Universidad del Azuay

Guatemala
Juan Ponciano
Escuela de Ciencias Físicas y Matemáticas (ECFM) de la Universidad de San Carlos de Guatemala

Honduras
Melissa  Cruz Torres 
HEP-EXP (LHCb)
Universidad Nacional Autónoma de Honduras (UNAH) - Tegucigalpa

Mexico
Malena Tejeda Yeomans
QCD, HEP-TH, pheno
Facultad de Ciencias, Universidad de Colima
Alexis Aguilar Arévalo
HEP-EXP (Neutrinos, DM, CONNIE, Oscura, CCM)
Universidad Autónoma de México (UNAM)
Luis Ureña
Cosmology
Universidad de Guanajuato

Paraguay
Diego Stalder
Universidad Nacional de Asunción

Peru
Alberto Gago
HEP-EXP (ALICE)
PUC-Peru, Lima

Uruguay
Lucía Duarte
HEP-PH
Universidad de la República de Uruguay

Venezuela
Arturo Sánchez Pineda
Computing, Education
Creative Commons
José Antonio López
HEP
Universidad Central de Venezuela, Caracas
Luis Nuñez
Computing, Education
Universidad Industrial de Santander (in Colombia)

USA
Juan Estrada
HEP-EXP (CONNIE, OSCURA)
Fermilab

Switzerland
Martijn Mulders
HEP-EXP (CMS)
CERN

  • Members of the Preparatory Group (2021-2023) – extended until December 2024
Argentina: Diana López Nacir (co-chair),  Federico Sanchez, Hernán Wahlberg
Bolivia: Martin Alfonso Subieta Vasquez
Brasil: Ignácio Bediaga, Jailson Alcaniz, Rogerio Rosenfeld (chair)
Chile: Alfonso Zerwekh, Mauro Cambiaso
Colombia: Nicolás Bernal, José David Ruiz Álvarez, Marta Losada (United Emirates/ex-oficio)
Ecuador: Dennis Cazar Ramírez, Harold Yepes Ramírez
Guatemala: María Eugenia Cabrera
Honduras: Melissa  Cruz Torres
Costa Rica: Federico Muñoz
Mexico: Alfredo Aranda, Juan Carlos D’Olivo, Gerardo Herrera Corral
Paraguay: Jorge Molina
Peru: Alberto Gago
Venezuela: Reina Camacho (France), José Antonio López, Arturo Sánchez (France)
USA: Marcela Carena (Fermilab), Francisco Yumiceva (CMS)
Switzerland: Martijn Mulders (CERN)
 
  • Members of the Preparatory Group (2018-2020)
Argentina: Diana López Nacir,  Federico Sanchez, Hernán Wahlberg
Bolivia: Martin Alfonso Subieta Vasquez
Brasil: Leandro de Paula (observer), Thiago S. Gonçalves (co-chair), Rogerio Rosenfeld
Chile: Alfonso Zerwekh, Mauro Cambiaso
Colombia: Marta Losada (chair), Diego Restrepo
Ecuador: Lofti Boubekeur, Harold Yepes Ramírez, Edgar Carrera
Mexico: Alfredo Aranda, Juan Carlos D’Olivo, Gerardo Herrera Corral
Paraguay: Jorge Molina
Peru: Alberto Gago
Venezuela: Reina Camacho, Arturo Sánchez
USA: Marcela Carena (Fermilab), Marcelle Soares-Santos (Brandeis U.)
Europe: Martijn Mulders (CERN)
Asia: Hiroaki Aihara (U. Tokyo)