Discovering and profiling Z' bosons using asymmetry observables in top quark pair production with the lepton-plus-jets final state at the LHC
arXiv:1609.05540
Abstract
The sensitivity of top quark pair production at the Large Hadron Collider to the presence and nature of an underlying Z' boson is studied, accounting for six-fermion decay with full tree-level Standard Model ttbar interference and all intermediate particles allowed off-shell. Focus is placed on the lepton-plus-jets final state, emulating experimental conditions, including kinematic requirements and top quark pair reconstruction in the presence of missing transverse energy and combinatorial ambiguity in jet-top assignment. Considering a resonance with mass of 4 TeV, and assuming 300 inverse fb of proton-proton collisions with a centre of mass energy of 13 TeV data, a combination of forward-backward and top polarisation asymmetries are shown to distinguish Z' embedded by different classes of Grand-Unified-Theory-inspired models. In combination with the differential cross section, they may be used to increase the significance of the signal when tested against the Standard Model, as shown using a likelihood-based statistical test.
arXiv comment28 pages, 33 figures, 4 tables, 93 citations
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Cited by in corpus (5)
- Anticipating Non-Resonant New Physics in Dilepton Angular Spectra at the LHC
- Minimal realization of right-handed gauge symmetry
- A heavy neutral gauge boson near the Z boson mass pole via third generation fermions at the LHC
- An alternative gauged symmetric model in light of the CDF II boson mass anomaly
- Using asymmetry observables to discover and distinguish Z' signals in top pair production with the lepton-plus-jets final state at the LHC