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 the Higgs boson production and decay rates and coupling strengt...

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

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→γγ,ZZ∗,WW∗,Zγ,bˉb,ττ and μμ decay modes, and the constraints on the associated production with a pair of top quarks and on the off-shell coupling strengths of the Higgs boson. The results are based on the LHC ...


Search for new phenomena in events with a photon and missing transverse momentu...

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

Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the Large Hadron Collider are reported. The data were collected in proton-proton collisions at a centre-of-mass energy of 13 TeV and correspond to an integrated luminosity of 3.2 fb−1. The observed data are in agreement with the Standard Model expectations. Exclusion limits...


Search for a high-mass Higgs boson decaying to a W boson pair in pp collisions ...

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

A search for a high-mass Higgs boson H is performed in the H → WW → ℓνℓν and H → WW → ℓνqq decay channels using pp collision data corresponding to an integrated luminosity of 20.3 fb−1 collected at s√=8 TeV by the ATLAS detector at the Large Hadron Collider. No evidence of a high-mass Higgs boson is found. Limits on σH × BR(H → WW) as a function of the Higgs boson mass mH are determined in three different scena...


Measurement of the charged-particle multiplicity inside jets from √s = 8 TeV pp...

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

The number of charged particles inside jets is a widely used discriminant for identifying the quark or gluon nature of the initiating parton and is sensitive to both the perturbative and non-perturbative components of fragmentation. This paper presents a measurement of the average number of charged particles with pT>500MeV inside high-momentum jets in dijet events using 20.3 fb−1 of data recorded with the ATLAS...


Search for supersymmetry at √s= 13 TeV in final states with jets and two same-s...

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

A search for strongly produced supersymmetric particles is conducted using signatures involving multiple energetic jets and either two isolated leptons (e or μ) with the same electric charge or at least three isolated leptons. The search also utilises b-tagged jets, missing transverse momentum and other observables to extend its sensitivity. The analysis uses a data sample of proton–proton collisions at √s=13 T...


Measurement of the relative width difference of the B-0-(B)over-bar(0) system w...

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

This paper presents the measurement of the relative width difference ∆Γd/Γd of the B0- ¯ B0 system using the data collected by the ATLAS experiment at the LHC in pp collisions at √s = 7TeV and √s = 8TeV and corresponding to an integrated luminosity of 25.2fb−1. The value of ∆Γd/Γd is obtained by comparing the decay-time distributions of B0 → J/ψKS and B0 → J/ψK∗0(892) decays. The result is ∆Γd/Γd = (−0.1±1.1 (st...


Search for bottom squark pair production in proton–proton collisions at √s=13 T...

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

The result of a search for pair production of the supersymmetric partner of the Standard Model bottom quark (˜b1) is reported. The search uses 3.2 fb−1 of pp collisions at √s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider in 2015. Bottom squarks are searched for in events containing large missing transverse momentum and exactly two jets identified as originating from b-quarks. No excess a...


Search for invisible decays of a Higgs boson using vector-boson fusion in pp co...

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

A search for a Higgs boson produced via vector-boson fusion and decaying into invisible particles is presented, using 20.3 fb−1 of proton-proton collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the LHC. For a Higgs boson with a mass of 125 GeV, assuming the Standard Model production cross section, an upper bound of 0.28 is set on the branching fraction of H → invisible at 95%...


Erratum to: ATLAS Run 1 searches for direct pair production of third-generation...

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

Erratum to: ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider ATLAS Collaboration; The online version of the original article can be found under doi:10.1140/epjc/s10052-015-3726-9


Search for new phenomena in events with at least three photons collected in pp ...

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

Results of a search for new phenomena in events with at least three photons are reported. Data from proton–proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb−1, were collected with the ATLAS detector at the LHC. The observed data are well described by the Standard Model. Limits at the 95 % confidence level on new phenomena are presented based on the rate ...

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