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


Measurements of top-quark pair differential cross-sections in the lepton+jets c...

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

Measurements of normalized differential cross-sections of top-quark pair production are presented as a function of the top-quark, tˉt system and event-level kinematic observables in proton–proton collisions at a centre-of-mass energy of √s=8TeV. The observables have been chosen to emphasize the tˉt production process and to be sensitive to effects of initial- and final-state radiation, to the different parton d...


Study of the rare decays of Bs0 and B0 into muon pairs from data collected duri...

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

A study of the decays B0s→μ+μ− and B0→μ+μ− has been performed using data corresponding to an integrated luminosity of 25 fb−1 of 7 and 8 TeV proton–proton collisions collected with the ATLAS detector during the LHC Run 1. For the B0 dimuon decay, an upper limit on the branching fraction is set at B(B0→μ+μ−)<4.2×10−10 at 95 % confidence level. For B0s, the branching fraction B(B0s→μ+μ−)=(0.9+1.1−0.8)×10−9 is mea...


Search for single top-quark production via flavour-changing neutral currents at...

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

A search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton–proton collisions at the LHC is presented. Data collected with the ATLAS detector in 2012 at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb−1 are used. Candidate events for a top quark decaying into a lepton, a neutrino and...


Charged-particle distributions in pp interactions at root s=8TeV measured with ...

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

This paper presents measurements of distributions of charged particles which are produced in proton–proton collisions at a centre-of-mass energy of √s=8TeV and recorded by the ATLAS detector at the LHC. A special dataset recorded in 2012 with a small number of interactions per beam crossing (below 0.004) and corresponding to an integrated luminosity of 160 μb−1 was used. A minimum-bias trigger was utilised to s...


Study of hard double-parton scattering in four-jet events in pp collisions at √...

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

Inclusive four-jet events produced in proton-proton collisions at a centre-of-mass energy of √s=7 TeV are analysed for the presence of hard double-parton scattering using data corresponding to an integrated luminosity of 37.3 pb−1, collected with the ATLAS detector at the LHC. The contribution of hard double-parton scattering to the production of four-jet events is extracted using an artificial neural network, ...


Search for flavour-changing neutral current top-quark decays to q Z in pp colli...

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

A search for the flavour-changing neutral-current decay t→qZ is presented. Data collected by the ATLAS detector during 2012 from proton–proton collisions at the Large Hadron Collider at a centre-of-mass energy of √s=8 TeV, corresponding to an integrated luminosity of 20.3 fb−1, are analysed. Top-quark pair-production events with one top quark decaying through the t→qZ (q=u,c) channel and the other through the d...


Measurement of the charge asymmetry in top-quark pair production in the lepton-...

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

This paper reports inclusive and differential measurements of the tˉt charge asymmetry AC in 20.3 fb−1 of √s=8 TeVpp collisions recorded by the ATLAS experiment at the Large Hadron Collider at CERN. Three differential measurements are performed as a function of the invariant mass, transverse momentum and longitudinal boost of the tˉt system. The tˉt pairs are selected in the single-lepton channels (e or μ) with...


Muon reconstruction performance of the ATLAS detector in proton-proton collisio...

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

This article documents the performance of the ATLAS muon identification and reconstruction using the LHC dataset recorded at √s=13 TeV in 2015. Using a large sample of J/ψ→μμ and Z→μμ decays from 3.2 fb−1 of pp collision data, measurements of the reconstruction efficiency, as well as of the momentum scale and resolution, are presented and compared to Monte Carlo simulations. The reconstruction efficiency is mea...


Search for gluinos in events with an isolated lepton, jets and missing transver...

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

The results of a search for gluinos in final states with an isolated electron or muon, multiple jets and large missing transverse momentum using proton–proton collision data at a centre-of-mass energy of √s=13 TeV are presented. The dataset used was recorded in 2015 by the ATLAS experiment at the Large Hadron Collider and corresponds to an integrated luminosity of 3.2 fb−1. Six signal selections are defined tha...


Erratum to: Study of the spin and parity of the Higgs boson in diboson decays w...

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

Erratum to: Eur. Phys. J. C (2015) 75:476 DOI 10.1140/epjc/s10052-015-3685-1; The online version of the original article can be found under doi:10.1140/epjc/s10052-015-3685-1

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