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

Amor Dos Santos, S. P. ; Araque, J. P. ; Cantrill, R. ; Castro, N. F. ; Fiolhais, M. C.N. ; Frederix, R. LU orcid ; Gonçalo, R. ; Martins, R. ; Santos, R. and Silva, J. , et al. (2015) In Physical Review D - Particles, Fields, Gravitation and Cosmology 92(3).
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... (More)

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¯).

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publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D - Particles, Fields, Gravitation and Cosmology
volume
92
issue
3
article number
034021
publisher
American Physical Society
external identifiers
  • scopus:84940841091
ISSN
1550-7998
DOI
10.1103/PhysRevD.92.034021
language
English
LU publication?
no
id
a4edf278-c706-49eb-af78-a7648ae5c146
date added to LUP
2019-05-28 15:42:01
date last changed
2023-09-09 04:15:15
@article{a4edf278-c706-49eb-af78-a7648ae5c146,
  abstract     = {{<p>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¯).</p>}},
  author       = {{Amor Dos Santos, S. P. and Araque, J. P. and Cantrill, R. and Castro, N. F. and Fiolhais, M. C.N. and Frederix, R. and Gonçalo, R. and Martins, R. and Santos, R. and Silva, J. and Onofre, A. and Peixoto, H. and Reigoto, A.}},
  issn         = {{1550-7998}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{3}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review D - Particles, Fields, Gravitation and Cosmology}},
  title        = {{Angular distributions in t t ¯ H (H →b b ¯) reconstructed events at the LHC}},
  url          = {{http://dx.doi.org/10.1103/PhysRevD.92.034021}},
  doi          = {{10.1103/PhysRevD.92.034021}},
  volume       = {{92}},
  year         = {{2015}},
}