75 documents found, page 1 of 8
Search for flavour-changing neutral-current interactions of a top quark and a g...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; Atlas Colaboration; et al.A search is presented for the production of a single top quark via left-handed flavour-changing neutral-current (FCNC) interactions of a top quark, a gluon and an up or charm quark. Two production processes are considered: u+ g→ t and c+ g→ t. The analysis is based on proton–proton collision data taken at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC. The data set corresponds to an integr...
Combined Measurement of the Higgs Boson Mass in pp Collisions at s =7 and 8 TeV...
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M.; Abouzeid, O. S.; Abramowicz, H.; Abreu, H.; Abreu, R.; Abulaiti, Y.Made available in DSpace on 2022-05-02T18:42:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-05-14; A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4 decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two exp...
Combined Measurement of the Higgs Boson Mass in pp Collisions at s =7 and 8 TeV...
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M.; Abouzeid, O. S.; Abramowicz, H.; Abreu, H.; Abreu, R.; Abulaiti, Y.Made available in DSpace on 2022-05-03T17:58:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-05-14; A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H→γγ and H→ZZ→4 decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two exp...
Search for charged Higgs bosons decaying into a top quark and a bottom quark at...
Fiolhais, M. C. N.; Veloso, F.; Wolters, H.; Gonçalo, R.; Atlas CollaborationA search for charged Higgs bosons decaying into a top quark and a bottom quark is presented. The data analysed correspond to 139 fb−1 of proton-proton collisions at p s = 13TeV, recorded with the ATLAS detector at the LHC. The production of a heavy charged Higgs boson in association with a top quark and a bottom quark, pp ! tbH+ ! tbtb, is explored in the H+ mass range from 200 to 2000 GeV using final states wi...
Search for squarks and gluinos in final states with jets and missing transverse...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; ATLAS CollaborationA search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing jets and missing transverse momentum, but no electrons or muons, is presented. The data used in this search were recorded by the ATLAS experiment in proton-proton collisions at a centre-of-mass energy of p s = 13TeV during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of...
Search for new phenomena in events with two opposite-charge leptons, jets and m...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; ATLAS CollaborationThe results of a search for direct pair production of top squarks and for dark matter in events with two opposite-charge leptons (electrons or muons), jets and missing transverse momentum are reported, using 139 fb−1 of integrated luminosity from protonproton collisions at p s = 13TeV, collected by the ATLAS detector at the Large Hadron Collider during Run 2 (2015–2018). This search considers the pair productio...
Measurement of light-by-light scattering and search for axion-like particles wi...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; ATLAS CollaborationThis paper describes a measurement of light-by-light scattering based on Pb+Pb collision data recorded by the ATLAS experiment during Run 2 of the LHC. The study uses 2.2 nb−1 of integrated luminosity collected in 2015 and 2018 at p sNN = 5.02TeV. Light-by-light scattering candidates are selected in events with two photons produced exclusively, each with transverse energy E T > 2.5 GeV, pseudorapidity | | < 2.3...
Search for pair production of third-generation scalar leptoquarks decaying into...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; ATLAS CollaborationA search for pair production of third-generation scalar leptoquarks decaying into a top quark and a -lepton is presented. The search is based on a dataset of pp collisions at p s = 13TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1. Events are selected if they have one light lepton (electron or muon) and at least one hadronical...
Search for doubly and singly charged Higgs bosons decaying into vector bosons i...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; ATLAS CollaborationA search for charged Higgs bosons decaying into W±W± or W±Z bosons is performed, involving experimental signatures with two leptons of the same charge, or three or four leptons with a variety of charge combinations, missing transverse momentum and jets. A data sample of proton-proton collisions at a centre-of-mass energy of 13TeV recorded with the ATLAS detector at the Large Hadron Collider between 2015 and 201...
Search for new phenomena in final states with b-jets and missing transverse mom...
Fiolhais, M. C. N.; Gonçalo, R.; Veloso, F.; Wolters, H.; ATLAS CollaborationThe results of a search for new phenomena in final states with b-jets and missing transverse momentum using 139 fb−1 of proton-proton data collected at a centre-of-mass energy p s = 13TeV by the ATLAS detector at the LHC are reported. The analysis targets final states produced by the decay of a pair-produced supersymmetric bottom squark into a bottom quark and a stable neutralino. The analysis also seeks eviden...