Search
Now showing items 1-10 of 39
Measurements of Top Quark Spin Observables in tt̅ Events Using Dilepton Final States in √s = 8 TeV PP Collisions with the ATLAS Detector
(Springer Verlag, 2018-09-12)
Measurements of top quark spin observables in tt¯ events are presented based on 20.2 fb−1 of s=8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final ...
Combination of Inclusive and Differential tt̅ Charge Asymmetry Measurements Using ATLAS and CMS Data at √s =7 and 8 TeV
This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt̅) events with a lepton + jets signature by the ATLAS and CMS Collaborations, using data from ...
Measurement of Jet Fragmentation in Pb+Pb and pp Collisions at √{snn} =5.02 TeV with the ATLAS Detector
This paper presents a measurement of jet fragmentation functions in 0.49 nb⁻¹ of Pb+Pb collisions and 25 pb⁻¹ of pp collisions at √{sNN}=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements ...
Measurement of the Soft-Drop Jet Mass in pp Collisions at √s =13 TeV with the ATLAS Detector
Jet substructure observables have significantly extended the search program for physics beyond the standard model at the Large Hadron Collider. The state-of-the-art tools have been motivated by theoretical calculations, ...
Search for Flavor-Changing Neutral Currents in Top Quark Decays T → Hc and T → Hu in Multilepton Final States in Proton-Proton Collisions at √s =13 TeV with the ATLAS Detector
Flavor-changing neutral currents are not present in the Standard Model at tree level and are suppressed in loop processes by the unitarity of the Cabibbo-Kobayashi-Maskawa matrix; the corresponding rates for top quark decay ...
Search for B - L R-Parity-Violating Top Squarks in √s=13 TeV pp Collisions with the ATLAS Experiment
A search is presented for the direct pair production of the stop, the supersymmetric partner of the top quark, that decays through an R-parity-violating coupling to a final state with two leptons and two jets, at least one ...
Search for Resonances in the Mass Distribution of Jet Pairs with One or Two Jets Identified as B -Jets in Proton-Proton Collisions at √s =13 TeV with the ATLAS Detector
A search for new resonances decaying into jets containing b-hadrons in pp collisions with the ATLAS detector at the LHC is presented in the dijet mass range from 0.57 to 7 TeV. The data set corresponds to an integrated ...
Search for Heavy Resonances Decaying into a W or Z Boson and a Higgs Boson in Final States with Leptons and B-Jets in 36 fb⁻¹ of √s=13 TeV pp Collisions with the ATLAS Detector
A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the νν̅bb̅, ℓ^±νbb̅, and ℓ⁺ℓ⁻bb̅ final states, where ℓ^± = e^± or μ^±, in pp collisions at √s=13 TeV. The data used correspond ...
Search for Higgs Boson Decays to Beyond-The-Standard-Model Light Bosons in Four-Lepton Events with the ATLAS Detector at √s=13 TeV
A search is conducted for a beyond-the-Standard-Model boson using events where a Higgs boson with mass 125 GeV decays to four leptons (ℓ = e or μ). This decay is presumed to occur via an intermediate state which contains ...
Study of the Rare Decays of B{_{s}⁰} and B⁰ Mesons into Muon Pairs Using Data Collected during 2015 and 2016 with the ATLAS Detector
A study of the decays B{_{s}⁰} → 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⁻ ...