A. J. Chuinard

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A search for Higgs boson decays to invisible particles is performed using 20.3 fb −1 of pp collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. The process considered is Higgs boson production in association with a vector boson (V = W or Z) that decays hadronically, resulting in events with two or(More)
Search for direct top squark pair production in final states with two tau leptons in pp collisions at √ s = 8 TeV with the ATLAS detector Abstract A search for direct pair production of the super-symmetric partner of the top quark, decaying via a scalar tau to a nearly massless gravitino, has been performed using 20 fb −1 of proton–proton collision data at(More)
A search for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data collected in 2012 at √ s = 8 TeV from pp collisions corresponding to an integrated luminosity of 20.3 fb −1 are examined. Particles producing anomalously high ionisation, consistent with long-lived massive particles with electric charges from |q| =(More)
Two searches for supersymmetric particles in final states containing a same-flavour opposite-sign lep-ton pair, jets and large missing transverse momentum are presented. The proton–proton collision data used in these searches were collected at a centre-of-mass energy √ s = 8 TeV by the ATLAS detector at the Large Hadron Collider and corresponds to an(More)
This paper reviews and extends searches for the direct pair production of the scalar supersymmetric partners of the top and bottom quarks in proton-proton collisions collected by the ATLAS collaboration during the LHC Run 1. Most of the analyses use 20 [Formula: see text] of collisions at a centre-of-mass energy of [Formula: see text] TeV, although in some(More)
Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the H → γ γ, Z Z * , W W * , Z γ, b ¯ b, ττ and μμ decay modes, and the constraints on the associated production with a pair of top quarks and on the off-shell(More)
Searches for pair-produced scalar leptoquarks are performed using 20 fb −1 of proton–proton collision data provided by the LHC and recorded by the ATLAS detector at √ s = 8 TeV. Events with two electrons (muons) and two or more jets in the final state are used to search for first (second)-generation leptoquarks. The results from two previously published(More)
This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20.3 fb −1 of proton–proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy √ s = 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet sub-structure(More)
The decays B + c → J/ψ D + s and B + c → J/ψ D * + s are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb −1 of pp collisions collected at centre-of-mass energies √ s = 7 TeV and 8 TeV, respectively. Signal candidates are identified through J/ψ → μ + μ − and D (*)+ s → φπ + (γ /π 0)(More)
Measurements of fiducial cross-sections for t ¯ t production with one or two additional b-jets in pp collisions at √ s = 8 TeV using the ATLAS detector Abstract Fiducial cross-sections for t ¯ t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb −1 of proton–proton collisions at a centre-of-mass energy of 8(More)