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

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Abstract

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¯).

Detaljer

Författare
  • 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
Externa organisationer
  • University of Coimbra
  • University of Minho
  • University of Porto
  • City College of New York
  • CERN
  • Universidade Nova de Lisboa
  • Laboratory of Instrumentation and Experimental Particles Physics
  • Polytechnical Institute of Lisbon
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Subatomär fysik
Originalspråkengelska
Artikelnummer034021
TidskriftPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volym92
Utgivningsnummer3
StatusPublished - 2015 aug 26
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa