Angular distributions in ttH(H arrow right bb) reconstructed events at the LHC

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 13 TeV at the LHC. Dileptonic final states of tt H events with two oppositely charged leptons and four jets from the decays t arrow right bW super(+) arrow right b[scriptl] super(+) [nu] sub([scriptl]), t arrow right bW super(-) arrow right b sub([scriptl]) super(-) [nu] sub([scriptl]) and h arrow right bb, are used. Signal events, generated with MadGraph5_aMCLO, 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).