Individual Mexican physicists have been working on experiments at CERN since UA1 (in the 1980s). Various institutes are participating in ALICE , working principally on the trigger system and in connection with cosmic-ray physics, and other institutes have joined CMS
In 1998, a Co-operation Agreement between the Consejo Nacional de Ciencia y Tecnología (CONACYT) of the United States of Mexico and CERN was signed in order to further develop the scientific and technical co-operation in high-energy physics. An Agreement has been signed with the National Autonomous University of Mexico to co-finance working exchange visits. Contacts with Mexico have been strengthened by its participation in HELEN (2005-2009) and EPLANET since February 2011.
The second CERN-Latin American School of High-Energy Physics was held in Mexico in 2003.
On the occasion of the LHC inauguration in October 2008, the Joint Director for Scientific and Academic Development of Consejo Nacional de Ciencia y Tecnología (CONACYT) visited CERN.
After the visit of a large Mexican Delegation, in September 2013, a Protocol to the 1998 Co-operation Agreement was established on 29 October 2013, with the aim of facilitating the participation of CONACyT and other Mexican Institutions in our Programmes.