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Open AccessJournal ArticleDOI

Search for pair production of up-type vector-like quarks and for four-top-quark events in final states with multiple b-jets with the ATLAS detector

Morad Aaboud, +2974 more
- 12 Jul 2018 - 
- Vol. 2018, Iss: 7, pp 089
TLDR
In this article, a search for pair production of up-type vector-like quarks with a significant branching ratio into a top quark and either a Standard Model Higgs boson or a Z boson is presented.
Abstract
A search for pair production of up-type vector-like quarks (T) with a significant branching ratio into a top quark and either a Standard Model Higgs boson or a Z boson is presented. The same analys ...

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Combination of the searches for pair-produced vectorlike partners of the third-generation quarks at s =13 TeV with the ATLAS detector

Morad Aaboud, +2938 more
TL;DR: Combined 95% confidence-level upper limits are set on the production cross section for a range of vectorlike quark scenarios, significantly improving upon the reach of the individual searches.
Journal ArticleDOI

Maximal flavour violation: a Cabibbo mechanism for leptoquarks

TL;DR: In this article, the authors proposed a mechanism that allows for sizeable flavour violation in quark-lepton currents, while suppressing flavour changing neutral currents, and applied it to the recently proposed 4321 renormalizable model to accommodate the current experimental anomalies in B-meson decays.
Journal ArticleDOI

Complete vectorlike fourth family and new U ( 1 ) ′ for muon anomalies

TL;DR: In this paper, the Standard Model (SM) with the addition of a ε-symmetric gauge symmetry and a complete fourth family of quarks and leptons was considered.
Journal ArticleDOI

LHC Dark Matter Working Group: Next-generation spin-0 dark matter models

Tomohiro Abe, +56 more
TL;DR: The 2HDM+a model proposed in this article provides the simplest theoretically consistent extension of the DM pseudoscalar simplified model and has been shown to have a rich and intricate pattern of mono-X signatures and the relevance of other DM as well as non-DM experiments.
References
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Journal ArticleDOI

Geant4—a simulation toolkit

S. Agostinelli, +126 more
TL;DR: The Gelfant 4 toolkit as discussed by the authors is a toolkit for simulating the passage of particles through matter, including a complete range of functionality including tracking, geometry, physics models and hits.
Journal ArticleDOI

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

Georges Aad, +2967 more
- 17 Sep 2012 - 
TL;DR: In this article, a search for the Standard Model Higgs boson in proton-proton collisions with the ATLAS detector at the LHC is presented, which has a significance of 5.9 standard deviations, corresponding to a background fluctuation probability of 1.7×10−9.
Journal ArticleDOI

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

S. Chatrchyan, +2863 more
- 17 Sep 2012 - 
TL;DR: In this paper, results from searches for the standard model Higgs boson in proton-proton collisions at 7 and 8 TeV in the CMS experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.8 standard deviations.
Journal ArticleDOI

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations

TL;DR: MadGraph5 aMC@NLO as discussed by the authors is a computer program capable of handling all these computations, including parton-level fixed order, shower-matched, merged, in a unified framework whose defining features are flexibility, high level of parallelisation and human intervention limited to input physics quantities.
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