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


Correction to: Identification and rejection of pile-up jets at high pseudorapid...

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

Correction to: Eur. Phys. J. C DOI 10.1140/epjc/s10052-017-5081-5. Unfortunately, in the original version of this article the copyright holder was wrong in the HTML. The original article has been corrected.


Performance of the ATLAS track reconstruction algorithms in dense environments ...

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

With the increase in energy of the Large Hadron Collider to a centre-of-mass energy of 13 TeV for Run 2, events with dense environments, such as in the cores of high-energy jets, became a focus for new physics searches as well as measurements of the Standard Model. These environments are characterized by charged-particle separations of the order of the tracking detectors sensor granularity. Basic track quantiti...


Search for lepton-flavour-violating decays of the Higgs and Z bosons with the A...

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

Direct searches for lepton flavour violation in decays of the Higgs and Z bosons with the ATLAS detector at the LHC are presented. The following three decays are considered: H→eτ, H→μτ, and Z→μτ. The searches are based on the data sample of proton–proton collisions collected by the ATLAS detector corresponding to an integrated luminosity of 20.3 fb−1 at a centre-of-mass energy of √s=8 TeV. No significant excess...


Measurement of detector-corrected observables sensitive to the anomalous produc...

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

Observables sensitive to the anomalous production of events containing hadronic jets and missing momentum in the plane transverse to the proton beams at the Large Hadron Collider are presented. The observables are defined as a ratio of cross sections, for events containing jets and large missing transverse momentum to events containing jets and a pair of charged leptons from the decay of a Z/γ∗ boson. This defi...


Measurement of forward-backward multiplicity correlations in lead-lead, proton-...

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

Two-particle pseudorapidity correlations are measured in √sNN=2.76TeVPb+Pb, √sNN=5.02TeVp+Pb, and √s=13TeVpp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7μb−1, 28 nb−1, and 65 nb−1, respectively. The correlation function CN(η1,η2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |η|<2.4. The correlation fun...


Jet reconstruction and performance using particle flow with the ATLAS Detector

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

This paper describes the implementation and performance of a particle flow algorithm applied to 20.2 fb−1 of ATLAS data from 8 TeV proton–proton collisions in Run 1 of the LHC. The algorithm removes calorimeter energy deposits due to charged hadrons from consideration during jet reconstruction, instead using measurements of their momenta from the inner tracker. This improves the accuracy of the charged-hadron m...


Measurements of integrated and differential cross sections for isolated photon ...

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

A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of √s=8  TeV is presented. The results are based on an integrated luminosity of 20.2  fb−1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|<1.37 or 1.56<|ηγ|<2.37 and transverse energies of respectively E...


Evidence for light-by-light scattering in heavy-ion collisions with the ATLAS d...

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

Light-by-light scattering (γγ right arrow γγ) is a quantum-mechanical process that is forbidden in the classical theory of electrodynamics. This reaction is accessible at the Large Hadron Collider thanks to the large electromagnetic field strengths generated by ultra-relativistic colliding lead ions. Using 480 μb−1 of lead–lead collision data recorded at a centre-of-mass energy per nucleon pair of 5.02 TeV by t...


Measurement of W boson angular distributions in events with high transverse mom...

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

The W boson angular distribution in events with high transverse momentum jets is measured using data collected by the ATLAS experiment from proton–proton collisions at a centre-of-mass energy View the MathML sources=8 TeV at the Large Hadron Collider, corresponding to an integrated luminosity of 20.3 fb−120.3 fb−1. The focus is on the contributions to W+jetsW+jets processes from real W emission, which is achiev...


Measurement of the tt¯Z and tt¯W production cross sections in multilepton final...

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

A measurement of the tˉtZ and tˉtW production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton–proton collisions at √s=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb−1. The inclusive cross sections are extra...

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