Search for invisible decay of the Higgs boson with the CMS detector

• Laurent Thomas (Université Libre de Bruxelles, Belgium)

Since its discovery in 2012, the Higgs boson properties have been studied in details by the ATLAS and CMS collaborations. Of particular interest is its decay branching ratio to invisible particles, expected to be very small by the Standard Model, but that could be significantly enhanced in case of couplings to new particles such as particles of dark matter. In this seminar, I will present the latest results from the CMS collaboration related to the search for such decays of the Higgs boson when it is produced through the fusion of vector bosons, from far the most sensitive channel experimentally. The various steps of the analysis will be described, with specific emphasis on the critical aspects such as theory incertainties on the background predictions and detector noise mitigation and on the interpretation in terms of a dark matter scenario.