Project/scholarship details
- Project/scholarship ID
143069
- Reference
CERN/FIS-NUC/0005/2015
- FundRef URI
- 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
Search for new high-mass phenomena in the dilepton final state using 36 fb(-1) ...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationA search is conducted for new resonant and non-resonant high-mass phenomena in dielectron and dimuon final states. The search uses 36.1 fb−1 of proton-proton collision data, collected at s√=13 TeV by the ATLAS experiment at the LHC in 2015 and 2016. No significant deviation from the Standard Model prediction is observed. Upper limits at 95% credibility level are set on the cross-section times branching ratio fo...
Search for direct top squark pair production in final states with two leptons i...
Onofre, A.; Castro, Nuno Filipe; ATLAS CollaborationThe results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb(-1) of integrated luminosity from proton-proton collisions at root s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark (t) over tilde and lighter supersymmetric particles, fou...
Search for pair production of heavy vector-like quarks decaying to high-p T W b...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationA search is presented for the pair production of heavy vector-like T quarks, primarily targeting the T quark decays to a W boson and a b-quark. The search is based on 36.1 fb−1 of pp collisions at s√=13 TeV recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Data are analysed in the lepton-plus-jets final state, including at least one b-tagged jet and a large-radius jet identifi...
Search for top quark decays t → qH, with H → γγ, in s√=13 TeV pp collisions usi...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThis article presents a search for flavour-changing neutral currents in the decay of a top quark into an up-type (q = c, u) quark and a Higgs boson, where the Higgs boson decays into two photons. The proton-proton collision data set analysed amounts to 36.1 fb−1 at s√=13 TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for, where one top quark decays into qH and the other dec...
Measurement of the cross-section for electroweak production of dijets in associ...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThe cross-section for the production of two jets in association with a leptonically decaying Z boson (Zjj ) is measured in proton–proton collisions at a centre-of-mass energy of 13 TeV, using data recorded with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 3.2 fb−1. The electroweak Zjj cross-section is extracted in a fiducial region chosen to enhance the electrowe...
Measurements of integrated and differential cross sections for isolated photon ...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationA 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; ATLAS CollaborationLight-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...
Performance of the ATLAS track reconstruction algorithms in dense environments ...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationWith 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...
Measurements of the production cross section of a Z boson in association with j...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationMeasurements of the production cross section of a Z boson in association with jets in proton–proton collisions at s√=13 TeV are presented, using data corresponding to an integrated luminosity of 3.16 fb−1 collected by the ATLAS experiment at the CERN Large Hadron Collider in 2015. Inclusive and differential cross sections are measured for events containing a Z boson decaying to electrons or muons and produced i...
Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–prot...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThis paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of s√=8 TeV. The performance has been measured as a function of the number of interactions per bunch crossing over a wide range, from one to seventy. The measureme...
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