IIHE topical seminar (POSTPONED): Search for SUSY in compressed mass spectra with soft opposite-sign dileptons with CMS at the LHC

by Mr Antonis Agapitos (University of Athens)

Thursday 24 Mar 2016, 14:00 → 15:00 Europe/Brussels

Jean Sacton Seminar room (1G003) (IIHE, VUB)

abstract: A search for supersymmetry (SUSY) in events with soft opposite-sign leptons, large missing transverse energy and one or two hard jets is presented. This final state is typical of SUSY scenarios with a small mass splitting (compressed mass spectra) between the lightest supersymmetric particle and the top squark or the chargino. Proton-proton collision data, collected in 2012 at a centre-of-mass energy of 8 TeV and corresponding to 19.7/fb with the CMS experiment, are used. The event selection strategy, the methods for estimating the Standard Model background and the methods for validating the background estimates are presented. The data observed in the signal region of the analysis are found to be in agreement with the predicted background, and as a result exclusion limits are set for different compressed signal scenarios. The current status of a similar analysis with 13 TeV data is also discussed.

Organised by Prof. Steven Lowette