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Photo of Rikkert Frederix

Rikkert Frederix

Senior lecturer

Photo of Rikkert Frederix

Angular distributions in t t ¯ H (H →b b ¯) reconstructed events at the LHC

Author

  • S. P. Amor Dos Santos
  • J. P. Araque
  • R. Cantrill
  • N. F. Castro
  • M. C.N. Fiolhais
  • R. Frederix
  • R. Gonçalo
  • R. Martins
  • R. Santos
  • J. Silva
  • A. Onofre
  • H. Peixoto
  • A. Reigoto

Summary, in English

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→bW+→b+ν, t¯→b¯W-→b¯-ν¯ 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¯).

Publishing year

2015-08-26

Language

English

Publication/Series

Physical Review D - Particles, Fields, Gravitation and Cosmology

Volume

92

Issue

3

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1550-7998