Arne-Rasmus Drager (Hamburg University (DE))
Searches for supersymmetric models with a compressed mass spectrum are presented using data samples corresponding to integrated luminosities of about 19.7 fb−1, collected at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. Compressed mass spectra, where multiple SUSY particles are nearly degenerate in mass, present a unique challenge to SUSY searches at the LHC. Such spectra are often difficult to detect experimentally in traditional searches due to the low pt of decay products as a result of the small mass splittings. In this talk, several approaches are explored such as boosting the entire susy system with a recoil against one or more jets from initial state radiation, and the partial reconstruction of final states where some decay products may be too soft to fully reconstruct with high efficiency.
CMS Collaboration (CERN)