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
Measurement of the double-differential high-mass Drell-Yan cross section in pp ...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThis paper presents a measurement of the double-differential cross section for the Drell-Yan Z/γ∗ → ℓ+ℓ− and photon-induced γγ → ℓ+ℓ− processes where ℓ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, mℓℓ, between 116 GeV and 1500 GeV using a sample of 20.3 fb−1 of pp collisions data at centre-of-mass energy of s√=8 TeV collected by the ATLAS detector at the LHC in ...
Search for anomalous couplings in the Wtb vertex from the measurement of double...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThe electroweak production and subsequent decay of single top quarks is determined by the properties of the Wtb vertex. This vertex can be described by the complex parameters of an effective Lagrangian. An analysis of angular distributions of the decay products of single top quarks produced in the t -channel constrains these parameters simultaneously. The analysis described in this paper uses 4.6 fb−1 of proton...
Search for pair production of gluinos decaying via stop and sbottom in events w...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationA search for supersymmetry involving the pair production of gluinos decaying via third-generation squarks to the lightest neutralino (χ˜01) is reported. It uses an LHC proton-proton data set at a center-of-mass energy s√=13 TeV with an integrated luminosity of 3.2 fb−1 collected with the ATLAS detector in 2015. The signal is searched for in events containing several energetic jets, of which at least three mus...
Performance of pile-up mitigation techniques for jets in pp collisions at √s=8 ...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThe large rate of multiple simultaneous proton–proton interactions, or pile-up, generated by the Large Hadron Collider in Run 1 required the development of many new techniques to mitigate the adverse effects of these conditions. This paper describes the methods employed in the ATLAS experiment to correct for the impact of pile-up on jet energy and jet shapes, and for the presence of spurious additional jets, wi...
Measurements of fiducial cross-sections for t(t)over-bar production with one or...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationFiducial cross-sections for tˉt production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb−1 of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for tˉt events with at least one additional b-jet is measured to be 950 ± 70 (stat.) +240−190 (syst.) fb in th...
Measurement of event-shape observables in Z -> l(+)l(-) events in pp collisions...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationEvent-shape observables measured using charged particles in inclusive Z-boson events are presented, using the electron and muon decay modes of the Z bosons. The measurements are based on an integrated luminosity of 1.1 fb−1 of proton–proton collisions recorded by the ATLAS detector at the LHC at a centre-of-mass energy √s=7 TeV. Charged-particle distributions, excluding the lepton–antilepton pair from the Z-bos...
Luminosity determination in pp collisions at √s = 8 TeV using the ATLAS detecto...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThe luminosity determination for the ATLAS detector at the LHC during pp collisions at √s= 8 TeV in 2012 is presented. The evaluation of the luminosity scale is performed using several luminometers, and comparisons between these luminosity detectors are made to assess the accuracy, consistency and long-term stability of the results. A luminosity uncertainty of δL/L=±1.9% is obtained for the 22.7fb−1 of pp colli...
Search for new phenomena with photon plus jet events in proton-proton collision...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationA search is performed for the production of high-mass resonances decaying into a photon and a jet in 3.2 fb−1 of proton-proton collisions at a centre-of-mass energy of s√=13 TeV collected by the ATLAS detector at the Large Hadron Collider. Selected events have an isolated photon and a jet, each with transverse momentum above 150 GeV. No significant deviation of the γ+jet invariant mass distribution from the bac...
Search for high-mass new phenomena in the dilepton final state using proton–pro...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationA search is conducted for both resonant and non-resonant high-mass new phenomena in dielectron and dimuon final states. The search uses View the MathML source3.2fb−1 of proton–proton collision data, collected at View the MathML sources=13TeV by the ATLAS experiment at the LHC in 2015. The dilepton invariant mass is used as the discriminating variable. No significant deviation from the Standard Model prediction ...
Measurement of the differential cross-sections of prompt and non-prompt product...
Onofre, A.; Castro, Nuno Filipe Silva Fernandes; ATLAS CollaborationThe production rates of prompt and non-prompt J/ψ and ψ(2S) mesons in their dimuon decay modes are measured using 2.1 and 11.4 fb−1 of data collected with the ATLAS experiment at the Large Hadron Collider, in proton–proton collisions at √s=7 and 8 respectively. Production cross-sections for prompt as well as non-prompt sources, ratios of ψ(2S) to J/ψ production, and the fractions of non-prompt production for J/...
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