CMS is a collaboration of institutions, which have joined together to build and operate the CMS detector, to analyze the data recorded with it, and to exploit the physics potential of the Large Hadron Collider at CERN.


There are several ways in which new collaborators can participate in CMS. These alternatives were defined by CMS in order that new groups can meaningfully collaborate in CMS even though their resources may initially preclude full membership. In order to launch the necessary procedure, a country or an institution wishing to join the Collaboration should contact the CMS Spokesperson to express its interest.


Countries or institutions that would like to join the CMS Collaboration are expected this can proceed through informal contacts, after which normally a formal letter is required. The Spokesperson will then bring the matter to the attention of the Management Board to explore how the prospective collaborators might be integrated into the experiment and consult the relevant Regional Representative. Subsequently, a letter will be sent to the applicant by the CMS Resources Manager requesting information concerning financial viability.

The prospective new collaborator will be invited to give a short presentation at a Collaboration Board meeting providing information on the composition of their research group, relevant experience and their proposed contribution to the experiment. After the presentation, the Collaboration Board will have a discussion and any questions raised will be passed on to the applicant for clarification.

The Collaboration Board Chairperson, the Spokesperson and the Resources Manager will meet the applicants and the appropriate Funding Agency contact to discuss the terms of entry. A final decision will be made at a later Collaboration Board meeting by a formal vote.