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


Study of the B-c(+) -> J/psi D-s(+) and Bc(+) -> J/psi D-s*(+) decays with the ...

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

The decays B+c→J/ψD+s and B+c→J/ψD∗+s are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb−1 of pp collisions collected at centre-of-mass energies √s=7 TeV and 8 TeV, respectively. Signal candidates are identified through J/ψ→μ+μ− and D(∗)+s→ϕπ+(γ/π0) decays. With a two-dimensional likelihood fit involving the B+c reconstructed invariant mass...


Measurements of the Higgs boson production and decay rates and constraints on i...

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

Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are presented. The combination is based on the analysis of five production processes, namely gluon fusion, vector boson fusion, and associated production with a W or a Z boson or a pair of top quarks, and of the six decay modes H → ZZ, W W , γγ, ττ, bb, and μμ...


Measurement of total and differential W plus w- production cross sections in pr...

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

The production of W boson pairs in proton-proton collisions at s√=8 TeV is studied using data corresponding to 20.3 fb−1 of integrated luminosity collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The W bosons are reconstructed using their leptonic decays into electrons or muons and neutrinos. Events with reconstructed jets are not included in the candidate event sample. A total of 6...


Search for resonances in diphoton events at root s=13TeV with the ATLAS detector

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

Searches for new resonances decaying into two photons in the ATLAS experiment at the CERN Large Hadron Collider are described. The analysis is based on proton-proton collision data corresponding to an integrated luminosity of 3.2 fb−1 at √s=13 TeV recorded in 2015. Two searches are performed, one targeted at a spin-2 particle of mass larger than 500 GeV, using Randall-Sundrum graviton states as a benchmark mode...


Identification of high transverse momentum top quarks in pp collisions at root ...

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

This paper presents studies of the performance of several jet-substructure techniques, which are used to identify hadronically decaying top quarks with high transverse momentum contained in large-radius jets. The efficiency of identifying top quarks is measured using a sample of top-quark pairs and the rate of wrongly identifying jets from other quarks or gluons as top quarks is measured using multijet events c...


The performance of the jet trigger for the ATLAS detector during 2011 data taking

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

The performance of the jet trigger for the ATLAS detector at the LHC during the 2011 data taking period is described. During 2011 the LHC provided proton–proton collisions with a centre-of-mass energy of 7 TeV and heavy ion collisions with a 2.76 TeV per nucleon–nucleon collision energy. The ATLAS trigger is a three level system designed to reduce the rate of events from the 40 MHz nominal maximum bunch crossin...


Search for charged Higgs bosons produced in association with a top quark and de...

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

Charged Higgs bosons produced in association with a single top quark and decaying via H±→τνH±→τν are searched for with the ATLAS experiment at the LHC, using proton–proton collision data at View the MathML sources=13 TeV corresponding to an integrated luminosity of 3.2 fb−13.2 fb−1. The final state is characterised by the presence of a hadronic τ decay and missing transverse momentum, as well as a hadronically ...


Constraints on non-Standard Model Higgs boson interactions in an effective Lagr...

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

The strength and tensor structure of the Higgs boson's interactions are investigated using an effective Lagrangian, which introduces additional CP-even and CP-odd interactions that lead to changes in the kinematic properties of the Higgs boson and associated jet spectra with respect to the Standard Model. The parameters of the effective Lagrangian are probed using a fit to five differential cross sections previ...


Search for new phenomena in final states with an energetic jet and large missin...

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

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses proton-proton collision data corresponding to an integrated luminosity of 3.2  fb−1 at s√=13  TeV collected in 2015 with the ATLAS detector at the Large Hadron Collider. Events are required to have at least one jet with a transverse momentum above 250 GeV and no leptons...


Measurement of the top quark mass in the tt¯→dilepton channel from s=8 TeV ATLA...

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

The top quark mass is measured in the View the MathML sourcett¯→dilepton channel (lepton=e,μlepton=e,μ) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of View the MathML sources=8 TeV and correspond to an integrated luminosity of about 20.2 fb−120.2 fb−1. Exploiting the template method, and using the distribution of invariant masses of lepton–...

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