Author(s): Amor dos Santos, S. ; Araque, Juan Pedro ; Cantrill, R. ; Castro, Nuno F. ; Fiolhais, Miguel C. N. ; Frederix, R. ; Gonçalo, R. ; Martins, R. ; Santos, R. ; Silva, J. ; Onofre, A. ; Peixoto, H. ; Reigoto, A.
Date: 2015
Persistent ID: https://hdl.handle.net/1822/39829
Origin: RepositóriUM - Universidade do Minho
The associated production of a Higgs boson and a top-quark pair, tt¯H, in proton-proton collisions is addressed in this paper for a center of mass energy of 13TeV at the LHC. Dileptonic final states of tt¯H events with two oppositely charged leptons and four jets from the decays t→bW+→bℓ+νℓ, t¯→b¯W−→b¯ℓ−ν¯ℓ and h→bb¯, are used. Signal events, generated with MadGraph5_aMC@NLO, are fully reconstructed by applying a kinematic fit. New angular distributions of the decay products as well as angular asymmetries are explored in order to improve discrimination of tt¯H signal events over the dominant irreducible background contribution, tt¯bb¯. Even after the full kinematic fit reconstruction of the events, the proposed angular distributions and asymmetries are still quite different in the tt¯H signal and the dominant background (tt¯bb¯).
