Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 5: BSM Suchen I (Diboson-Resonanzen)

T 5.6: Talk

Monday, February 29, 2016, 12:15–12:30, VMP5 SR 0077

Studies on searches for narrow resonances decaying into WZ or ZZ boson pairs — •Daniel Narrias-Villar and Oleg Brandt — Kirchhoff-Institute for Physics, Heidelberg University, Heidelberg, Germany

The increased centre-of-mass energy of 13 TeV in Run 2 of the LHC provides an excellent ground to search for resonances in the diboson invariant mass spectrum above 1 TeV, where the sensitivity in Run 1 was limited by data statistics. Studies of such resonances decaying into WZ or ZZ boson pairs, where one Z decays into a pair of charged leptons and the other W or Z decays hadronically, are presented. In the kinematic boosted regime considered, the hadronic decay products of W or Z bosons form a single large-R jet, which is identified as a boson jet using jet substructure properties. The invariant mass distribution of the system of such jet and highly energetic lepton pair from a Z boson decay is used as discriminator for the diboson resonance search. Studies on further kinematic distributions for SM backgrounds and various beyond-SM signal models are investigated in order to potentially improve the background rejection.