2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/182502The flavor-changing neutral current decay B_s->mu mu is highly suppressed in the standard model, but its branching fraction of 3.4*10^-9 could be significantly enhanced through contributions from new physics. At the LHC, this rare decay could be observed for the first time. In this contribution, the prospects for measuring B_s->mu mu with the CMS detector are presented. In particular, some aspects of the experimental setup, the first and high level trigger selections, and the offline analysis are discussed.5 pages, to appear in the proceedings of BEAUTY 2005, June 20-24, 2005, Assisi (Italy)High Energy Physics - Experimenttext