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


Simultaneous measurements of the tt¯, W+W−, and Z/γ∗→ττ production cross-sectio...

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

Simultaneous measurements of the tt¯, W+W−, and Z/γ∗→ττ production cross-sections using an integrated luminosity of 4.6 fb−1 of pp collisions at s√=7 TeV collected by the ATLAS detector at the LHC are presented. Events are selected with two high transverse momentum leptons consisting of an oppositely charged electron and muon pair. The three processes are separated using the distributions of the missing transve...


Search for higgs and Z boson decays to J/ψγ and (nS)γ with the ATLAS detector

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

A search for the decays of the Higgs and Z bosons to J/ψγ and Υ(nS)γ (n=1,2,3) is performed with pp collision data samples corresponding to integrated luminosities of up to 20.3fb−1 collected at s√=8TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above expected backgrounds and 95% CL upper limits are placed on the branching fractions. In the J/ψγ final ...


Combined Measurement of the Higgs Boson Mass in pp Collisions at root s=7 and 8...

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

A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4ℓ decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. The measured masses from the individual channels and the two experiments are found to be consistent...


Search for the associated production of the Higgs boson with a top quark pair i...

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

A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb−1 of proton-proton collision data recorded by the ATLAS experiment at s√=8 TeV at the Large Hadron Collider. Five final states, targeting the decays H→WW∗, ττ, and ZZ∗, are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) w...


Search for long-lived, weakly interacting particles that decay to displaced had...

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

A search for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC is presented. This analysis uses the full dataset recorded in 2012: 20.3 fb−1 of proton--proton collision data at s√=8 TeV. The search employs techniques for reconstructing decay vertices of long-lived particles decaying to jets in the inner tracking detector and muon spectrometer. S...


Search for charged Higgs bosons decaying via H± → τ±ν in fully hadronic final s...

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

The results of a search for charged Higgs bosons decaying to a τ lepton and a neutrino, H±→τ±ν, are presented. The analysis is based on 19.5 fb−1 of proton--proton collision data at s√=8 TeV collected by the ATLAS experiment at the Large Hadron Collider. Charged Higgs bosons are searched for in events consistent with top-quark pair production or in associated production with a top quark. The final state is char...


Measurement of exclusive γγ→ℓ+ℓ− production in proton--proton collisions at s√=...

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

This Letter reports a measurement of the exclusive γγ→ℓ+ℓ−(ℓ=e,μ) cross-section in proton--proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb−1. For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section ...


Search for massive, long-lived particles using multitrack displaced vertices or...

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

Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production point into two leptons or into five or more charged particles. This analysis uses a data sample of proton-proton collisions at s√ = 8 TeV corresponding to an...


Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top ...

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

A measurement of spin correlation in tt¯ production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb−1. The correlation between the top and antitop quark spins is extracted from dilepton tt¯ events by using the difference in azimuthal angle between the two c...


Measurement of transverse energy-energy correlations in multi-jet events in pp ...

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

High transverse momentum jets produced in pp collisions at a centre of mass energy of 7 TeV are used to measure the transverse energy--energy correlation function and its associated azimuthal asymmetry. The data were recorded with the ATLAS detector at the LHC in the year 2011 and correspond to an integrated luminosity of 158 pb−1. The selection criteria demand the average transverse momentum of the two leading...

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