Project/scholarship details


  • Funder

    FCT - Fundação para a Ciência e a Tecnologia, I.P.

  • Funder's country

    Portugal

  • Funding program

    3599-PPCDT

  • Funding amount

    400,000.00 €

  • Start date

    2015-03-01

  • End date

    2017-02-28

Documents


Search for single production of vector-like quarks decaying into Wb in pp colli...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

A search for singly produced vector-like Q quarks, where Q can be either a T quark with charge +2/3 or a Y quark with charge −4/3, is performed in proton–proton collisions recorded with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 20.3 fb−1 and was produced with a centre-of-mass energy of √s=8 TeV. This analysis targets Q→Wb decays where the W boson decays leptonically. ...


Test of CP invariance in vector-boson fusion production of the Higgs boson usin...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

A test of CP invariance in Higgs boson production via vector-boson fusion using the method of the Optimal Observable is presented. The analysis exploits the decay mode of the Higgs boson into a pair of τ leptons and is based on 20.3 fb−1 of proton–proton collision data at √s = 8 TeV collected by the ATLAS experiment at the LHC. Contributions from CP-violating interactions between the Higgs boson and electroweak...


Searches for heavy diboson resonances in pp collisions at root S=13 TeV with th...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

Searches for new heavy resonances decaying to WW, WZ, and ZZ bosons are presented, using a data sample corresponding to 3.2 fb−1 of pp collisions at s√=13 TeV collected with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting ννqq, ℓνqq, ℓℓqq and qqqq final states are combined, searching for an arrow-width resonance with mass between 500 and 3000 GeV. The discriminating variable is either a...


Measurement of the differential cross-sections of prompt and non-prompt product...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

The production rates of prompt and non-prompt J/ψ and ψ(2S) mesons in their dimuon decay modes are measured using 2.1 and 11.4 fb−1 of data collected with the ATLAS experiment at the Large Hadron Collider, in proton–proton collisions at √s=7 and 8 respectively. Production cross-sections for prompt as well as non-prompt sources, ratios of ψ(2S) to J/ψ production, and the fractions of non-prompt production for J/...


Measurement of the photon identification efficiencies with the ATLAS detector u...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb−1 of pp collision data collected at the LHC at √s=7 TeV and 20.3 fb−1 at √s=8 TeV. The efficiencies are measured separately for converted and unconverted photons, in four different pseudorapidity regions, for transverse momenta...


Search for strong gravity in multijet final states produced in pp collisions at...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

A search is performed for the production of high-mass resonances decaying into a photon and a jet in 3.2 fb−1 of proton-proton collisions at a centre-of-mass energy of s√=13 TeV collected by the ATLAS detector at the Large Hadron Collider. Selected events have an isolated photon and a jet, each with transverse momentum above 150 GeV. No significant deviation of the γ+jet invariant mass distribution from the bac...


Measurements of fiducial cross-sections for t(t)over-bar production with one or...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

Fiducial cross-sections for tˉt 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 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for tˉt events with at least one additional b-jet is measured to be 950 ± 70 (stat.) +240−190 (syst.) fb in th...


Measurement of event-shape observables in Z -> l(+)l(-) events in pp collisions...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

Event-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of 1.1 fb−1 of proton–proton collisions recorded by the ATLAS detector at the LHC at a centre-of-mass energy √s=7 TeV. Charged-particle distributions, excluding the lepton–antilepton pair from the Z-bos...


Luminosity determination in pp collisions at √s = 8 TeV using the ATLAS detecto...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

The luminosity determination for the ATLAS detector at the LHC during pp collisions at √s= 8 TeV in 2012 is presented. The evaluation of the luminosity scale is performed using several luminometers, and comparisons between these luminosity detectors are made to assess the accuracy, consistency and long-term stability of the results. A luminosity uncertainty of δL/L=±1.9% is obtained for the 22.7fb−1 of pp colli...


Search for new phenomena with photon plus jet events in proton-proton collision...

Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration

A search is performed for the production of high-mass resonances decaying into a photon and a jet in 3.2 fb−1 of proton-proton collisions at a centre-of-mass energy of s√=13 TeV collected by the ATLAS detector at the Large Hadron Collider. Selected events have an isolated photon and a jet, each with transverse momentum above 150 GeV. No significant deviation of the γ+jet invariant mass distribution from the bac...

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