Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 26: Suche nach Supersymmetrie II (Leptonische Endzustände)

T 26.3: Vortrag

Montag, 29. Februar 2016, 17:15–17:30, VMP5 HS B2

Data-driven background predictions for a search of direct gluino pair production in the single-lepton final state using 13 TeV pp-collisions at the CMS experiment. — •Artur Lobanov, Claudia Seitz, and Isabell Melzer-Pellmann — DESY, Hamburg

We present a search for direct gluino-pair production in events with a single lepton using 13 TeV pp-collisions at the CMS experiment. This final state is characterised by high multiplicities of jets and b-quark jets, as well as a large scalar sum of all jet transverse momenta, and a large scalar sum of the transverse missing momentum and the lepton transverse momentum, called L_T. The dominating Standard Model backgrounds in this phase-space are tt+jets and W+jets production. A data-driven method is used to estimate the background in the search regions. All backgrounds except for QCD in the (high Δ Φ(W,l)) signal regions are predicted by from the number of events in the low Δ Φ(W,l) region, with transfer factors determined also from data, while for the multi-jet events a fake-lepton enriched side-band is used. We conclude by showing predictions and final results from data corresponding to 2.1fb⁻¹ integrated luminosity recorded with the CMS detector during the LHC Run2 in 2015.