# Project/scholarship details

## Collaboration in the ATLAS Experiment

• 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

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## Search for top squarks in final states with one isolated lepton, jets, and miss...

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

The results of a search for the top squark, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, jets, and missing transverse momentum are reported. The search uses the 2015 LHC pp collision data at a center-of-mass energy of s√=13  TeV recorded by the ATLAS detector and corresponding to an integrated luminosity of 3.2  fb−1. The analysis targets two types of signal m...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Measurement of W± and Z-boson production cross sections in pp collisions at s=1...

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

Measurements of the W±→ℓ±νW±→ℓ±ν and Z→ℓ+ℓ−Z→ℓ+ℓ− production cross sections (where ℓ±=e±,μ±ℓ±=e±,μ±) in proton–proton collisions at View the MathML sources=13 TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb−1. The total inclusive W±W±-boson production cross sections times the single-lepton-flavour branching ratio...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Measurement of the charge asymmetry in highly boosted top-quark pair production...

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

In the View the MathML sourcepp→tt¯ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb−1 of pp collision data at V...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Search for single production of a vector-like quark via a heavy gluon in the 4b...

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

A search is performed for the process View the MathML sourcepp→G⁎→BHb¯/B¯Hb→Hbb¯→bb¯bb¯, predicted in composite Higgs scenarios, where G⁎G⁎ is a heavy colour octet vector resonance and BHBH a vector-like quark of charge −1/3−1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb−119.5 fb−1, recorded by the ATLAS detector at the LHC...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Search for resonances in the mass distribution of jet pairs with one or two jet...

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

Searches for high-mass resonances in the dijet invariant mass spectrum with one or two jets identified as b -jets are performed using an integrated luminosity of 3.2 fb−13.2 fb−1 of proton–proton collisions with a centre-of-mass energy of View the MathML sources=13 TeV recorded by the ATLAS detector at the Large Hadron Collider. No evidence of anomalous phenomena is observed in the data, which are used to exclu...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ...

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

The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called jet charge, in dijet events using 20.3  fb−1 of data recorded with the ATLAS detector at s√=8  TeV in pp collisions at the LHC. The jet charge distribution is unfolded to remove distortions from...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## A search for an excited muon decaying to a muon and two jets in pp collisions a...

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

A new search signature for excited leptons is explored. Excited muons are sought in the channel ${pp}\to \mu {\mu }^{* }\to \mu \mu \ {\rm{jet}}\;{\rm{jet}}$, assuming both the production and decay occur via a contact interaction. The analysis is based on 20.3 fb−1 of pp collision data at a centre-of-mass energy of $\sqrt{s}\;=\;8\;{\rm{TeV}}$ taken with the ATLAS detector at the large hadron collider. No evide...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## The ATLAS data acquisition and high level trigger system

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

This paper describes the data acquisition and high level trigger system of the ATLAS experiment at the Large Hadron Collider at CERN, as deployed during Run 1. Data flow as well as control, configuration and monitoring aspects are addressed. An overview of the functionality of the system and of its performance is presented and design choices are discussed.

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Search for heavy long-lived charged R-hadrons with the ATLAS detector in 3.2 fb...

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

A search for heavy long-lived charged R-hadrons is reported using a data sample corresponding to 3.2 fb−1 of proton–proton collisions at View the MathML sources=13 TeV collected by the ATLAS experiment at the Large Hadron Collider at CERN. The search is based on observables related to large ionisation losses and slow propagation velocities, which are signatures of heavy charged particles travelling significantl...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho

## Measurement of the Inelastic Proton-Proton Cross Section at s =13 TeV with the ...

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

This Letter presents a measurement of the inelastic proton-proton cross section using 60  μb−1 of pp collisions at a center-of-mass energy s√ of 13 TeV with the ATLAS detector at the LHC. Inelastic interactions are selected using rings of plastic scintillators in the forward region (2.07<|η|<3.86) of the detector. A cross section of 68.1±1.4  mb is measured in the fiducial region ξ=M2X/s>10−6, where MX is the l...

Date: 2016   |   Origin: RepositóriUM - Universidade do Minho
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