L. Ciaccio

article

Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt and displaced signatures with the ATLAS detector

The ATLAS collaboration, G. Aad, B. Abbott, D. C. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 10 > 1-47

Abstract The problems of neutrino masses, matter-antimatter asymmetry, and dark matter could be successfully addressed by postulating right-handed neutrinos with Majorana masses below the electroweak scale. In this work, leptonic decays of W bosons extracted from 32.9 fb⁻¹ to 36.1 fb⁻¹ of 13 TeV proton–proton collisions at the LHC are used to search for heavy neutral leptons (HNLs) that are produced...

article

Measurement of the inclusive isolated-photon cross section in pp collisions at s $$ \sqrt{s} $$ = 13 TeV using 36 fb⁻¹ of ATLAS data

The ATLAS collaboration, G. Aad, B. Abbott, D. C. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 10 > 1-51

Abstract The differential cross section for isolated-photon production in pp collisions is measured at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC using an integrated luminosity of 36.1 fb⁻¹. The differential cross section is presented as a function of the photon transverse energy in different regions of photon pseudorapidity. The differential cross section as a function...

article

Measurement of ZZ production in the ℓℓνν final state with the ATLAS detector in pp collisions at s $$ \sqrt{s} $$ = 13 TeV

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 10 > 1-48

Abstract This paper presents a measurement of ZZ production with the ATLAS detector at the Large Hadron Collider. The measurement is carried out in the final state with two charged leptons and two neutrinos, using data collected during 2015 and 2016 in pp collisions at s $$ \sqrt{s} $$ = 13 TeV, corresponding to an integrated luminosity of 36.1 fb⁻¹. The integrated cross-sections in the total...

article

Search for diboson resonances in hadronic final states in 139 fb⁻¹ of pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

The ATLAS collaboration, G. Aad, B. Abbott, D. C. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 9 > 1-43

Abstract Narrow resonances decaying into W W, W Z or ZZ boson pairs are searched for in 139 fb⁻¹ of proton-proton collision data at a centre-of-mass energy of s $$ \sqrt{s} $$ = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider from 2015 to 2018. The diboson system is reconstructed using pairs of high transverse momentum, large-radius jets. These jets are built from a combination...

article

Erratum to: Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb⁻¹ of s $$ \sqrt{s} $$ = 13 TeV pp collision data with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 8 > 1-19

One correction is made to the figure 4e of the paper.

article

Measurement of jet-substructure observables in top quark, W boson and light jet production in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 8 > 1-47

Abstract A measurement of jet substructure observables is presented using data collected in 2016 by the ATLAS experiment at the LHC with proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV. Large-radius jets groomed with the trimming and soft-drop algorithms are studied. Dedicated event selections are used to study jets produced by light quarks or gluons, and hadronically decaying top quarks...

article

Search for scalar resonances decaying into μ⁺μ⁻ in events with and without b-tagged jets produced in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 7 > 1-41

Abstract A search for a narrow scalar resonance decaying into an opposite-sign muon pair produced in events with and without b-tagged jets is presented in this paper. The search uses 36.1 fb⁻¹ of s = 13 $$ \sqrt{s}=13 $$ TeV proton-proton collision data recorded by the ATLAS experiment at the LHC. No significant excess of events above the expected Standard Model background is observed in...

article

Searches for third-generation scalar leptoquarks in s $$ \sqrt{s} $$ = 13 TeV pp collisions with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 6 > 1-48

Abstract Limits are set on the pair production of scalar leptoquarks, where all possible decays of the leptoquark into a quark (t, b) and a lepton (τ, ν) of the third generation are considered. The limits are presented as a function of the leptoquark mass and the branching ratio into charged leptons for up-type (LQ ₃^u → tν/bτ) and down-type (LQ ₃^d → bν/tτ) leptoquarks. Many results are reinterpretations...

article

Measurement of $$W^{\pm }Z$$ W±Z production cross sections and gauge boson polarisation in pp collisions at $$\sqrt{s} = 13~\text {TeV}$$ s=13TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, more

The European Physical Journal C > 2019 > 79 > 6 > 1-34

This paper presents measurements of $$W^{\pm }Z$$ W±Z production cross sections in pp collisions at a centre-of-mass energy of 13 $$\text {TeV}$$ TeV . The data were collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider, and correspond to an integrated luminosity of $$36.1~\hbox {fb}^{-1}$$ 36.1fb-1 . The $$W^{\pm }Z$$ W±Z candidate events are reconstructed using leptonic...

article

Search for single production of vector-like quarks decaying into Wb in pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-56

Abstract A search for singly produced vector-like quarks Q, where Q can be either a T quark with charge +2/3 or a Y quark with charge −4/3, is performed in proton–proton collision data at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 36.1 fb⁻¹, recorded with the ATLAS detector at the LHC in 2015 and 2016. The analysis targets Q → Wb decays where the W boson decays...

article

Constraints on mediator-based dark matter and scalar dark energy models using s $$ \sqrt{s} $$ = 13 TeV pp collision data collected by the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-87

Abstract Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to 37 fb⁻¹ s $$ \sqrt{s} $$ = 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this paper. The results of experimental searches in a variety of final states are interpreted in terms of a set of spin-1 and spin-0 single-mediator dark...

article

Measurement of VH, H → b b ¯ $$ \mathrm{H}\to \mathrm{b}\overline{\mathrm{b}} $$ production as a function of the vector-boson transverse momentum in 13 TeV pp collisions with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-36

Abstract Cross-sections of associated production of a Higgs boson decaying into bottomquark pairs and an electroweak gauge boson, W or Z, decaying into leptons are measured as a function of the gauge boson transverse momentum. The measurements are performed in kinematic fiducial volumes defined in the ‘simplified template cross-section’ framework. The results are obtained using 79.8 fb⁻¹ of proton-proton...

article

Search for Higgs boson pair production in the WW^()WW^() decay channel using ATLAS data recorded at s $$ \sqrt{\mathrm{s}} $$ = 13 TeV

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-38

Abstract A search for a pair of neutral, scalar bosons with each decaying into two W bosons is presented using 36.1 fb⁻¹ of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. This search uses three production models: non-resonant and resonant Higgs boson pair production and resonant production of a pair of heavy scalar...

article

Search for top-quark decays t → Hq with 36 fb⁻¹ of pp collision data at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-67

Abstract A search for flavour-changing neutral current decays of a top quark into an up-type quark (q = u, c) and the Standard Model Higgs boson, t → Hq, is presented. The search is based on a dataset of pp collisions at s $$ \sqrt{s} $$ = 13 TeV recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 36.1 fb⁻¹....

article

Combinations of single-top-quark production cross-section measurements and |f_LVV_tb| determinations at s $$ \sqrt{s} $$ = 7 and 8 TeV with the ATLAS and CMS experiments

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-81

Abstract This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at s $$ \sqrt{s} $$ = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb⁻¹ at s $$ \sqrt{s} $$ = 7 TeV and 12.2 to 20.3 fb⁻¹ at s $$ \sqrt{s} $$ = 8 TeV. These combinations...

article

Search for large missing transverse momentum in association with one top-quark in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 5 > 1-50

Abstract This paper describes a search for events with one top-quark and large missing transverse momentum in the final state. Data collected during 2015 and 2016 by the ATLAS experiment from 13 TeV proton–proton collisions at the LHC corresponding to an integrated luminosity of 36.1 fb⁻¹ are used. Two channels are considered, depending on the leptonic or the hadronic decays of the W boson from the...

article

Study of the rare decays of B_s⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 4 > 1-47

Abstract A study of the decays B_s⁰ → μ⁺μ⁻ and B⁰ → μ⁺μ⁻ has been performed using 26.3 fb⁻¹ of 13 TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in μ⁺μ⁻ invariant mass is comparable to the B_s⁰ -B⁰ mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction...

article

Search for Higgs boson pair production in the b b ¯ W W * $$ b\overline{b}W{W}^{*} $$ decay mode at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 4 > 1-50

Abstract A search for Higgs boson pair production in the b b ¯ W W * $$ b\overline{b}W{W}^{*} $$ decay mode is performed in the b b ¯ ℓνqq $$ b\overline{b}\mathit{\ell \nu qq} $$ final state using 36.1 fb⁻¹ of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. No evidence of events beyond the background...

article

Measurement of the ratio of cross sections for inclusive isolated-photon production in pp collisions at s $$ \sqrt{s} $$ = 13 and 8 TeV with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 4 > 1-47

Abstract The ratio of the cross sections for inclusive isolated-photon production in pp collisions at centre-of-mass energies of 13 and 8 TeV is measured using the ATLAS detector at the LHC. The integrated luminosities of the 13 TeV and 8 TeV datasets are 3.2 fb⁻¹ and 20.2 fb⁻¹, respectively. The ratio is measured as a function of the photon transverse energy in different regions of the photon pseudorapidity...

article

Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, more

Journal of High Energy Physics > 2019 > 2019 > 4 > 1-50

Abstract A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb⁻¹ of proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV delivered by the Large Hadron Collider. The differential cross-section is measured for events containing two same-flavour opposite-sign lepton pairs. It exhibits a rich structure, with different...

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Search results for: L. Ciaccio

Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt and displaced signatures with the ATLAS detector

Measurement of the inclusive isolated-photon cross section in pp collisions at s $$ \sqrt{s} $$ = 13 TeV using 36 fb⁻¹ of ATLAS data

Measurement of ZZ production in the ℓℓνν final state with the ATLAS detector in pp collisions at s $$ \sqrt{s} $$ = 13 TeV

Search for diboson resonances in hadronic final states in 139 fb⁻¹ of pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

Erratum to: Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb⁻¹ of s $$ \sqrt{s} $$ = 13 TeV pp collision data with the ATLAS detector

Measurement of jet-substructure observables in top quark, W boson and light jet production in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

Search for scalar resonances decaying into μ⁺μ⁻ in events with and without b-tagged jets produced in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector

Searches for third-generation scalar leptoquarks in s $$ \sqrt{s} $$ = 13 TeV pp collisions with the ATLAS detector

Measurement of $$W^{\pm }Z$$ W±Z production cross sections and gauge boson polarisation in pp collisions at $$\sqrt{s} = 13~\text {TeV}$$ s=13TeV with the ATLAS detector

Search for single production of vector-like quarks decaying into Wb in pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

Constraints on mediator-based dark matter and scalar dark energy models using s $$ \sqrt{s} $$ = 13 TeV pp collision data collected by the ATLAS detector

Measurement of VH, H → b b ¯ $$ \mathrm{H}\to \mathrm{b}\overline{\mathrm{b}} $$ production as a function of the vector-boson transverse momentum in 13 TeV pp collisions with the ATLAS detector

Search for Higgs boson pair production in the WW^()WW^() decay channel using ATLAS data recorded at s $$ \sqrt{\mathrm{s}} $$ = 13 TeV

Search for top-quark decays t → Hq with 36 fb⁻¹ of pp collision data at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

Combinations of single-top-quark production cross-section measurements and |f_LVV_tb| determinations at s $$ \sqrt{s} $$ = 7 and 8 TeV with the ATLAS and CMS experiments

Search for large missing transverse momentum in association with one top-quark in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

Study of the rare decays of B_s⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector

Search for Higgs boson pair production in the b b ¯ W W * $$ b\overline{b}W{W}^{*} $$ decay mode at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

Measurement of the ratio of cross sections for inclusive isolated-photon production in pp collisions at s $$ \sqrt{s} $$ = 13 and 8 TeV with the ATLAS detector

Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector

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