Measurement of the W Boson Polarisation in tt̅ events from pp Collisions at √s̅ = 8 TeV in the Lepton + Jets Channel with ATLAS

dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorAaboud, M.en_US
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAbeloos, B.en_US
dc.contributor.authorAbouZeid, O. S.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorMeirose, Bernharden_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorKurth, Matthew G.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorKurth, Matthew G.en_US
dc.contributor.utdAuthorLeyton, Michaelen_US
dc.contributor.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.date.accessioned2018-05-15T19:51:26Z
dc.date.available2018-05-15T19:51:26Z
dc.date.created2017-04-07en_US
dc.date.issued2018-05-15
dc.description.abstractMeasurements of jet activity in top-quark pair events produced in proton–proton collisions are presented, using 3.2 fb⁻¹ of pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events are chosen by requiring an opposite-charge eμ pair and two b-tagged jets in the final state. The normalised differential cross-sections of top-quark pair production are presented as functions of additional-jet multiplicity and transverse momentum, p_T. The fraction of signal events that do not contain additional jet activity in a given rapidity region, the gap fraction, is measured as a function of the p_T threshold for additional jets, and is also presented for different invariant mass regions of the eμbb̅ system. All measurements are corrected for detector effects and presented as particle-level distributions compared to predictions with different theoretical approaches for QCD radiation. While the kinematics of the jets from top-quark decays are described well, the generators show differing levels of agreement with the measurements of observables that depend on the production of additional jets.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationAaboud, M., G. Aad, B. Abbott, J. Abdallah, et al. 2017. "Measurement of jet activity produced in top-quark events with an electron, a muon and two b-tagged jets in the final state in pp collisions at √s̅=13 TeV with the ATLAS detector." European Physical Journal C 77(4), doi:10.1140/epjc/s10052-017-4766-0en_US
dc.identifier.issn1434-6044en_US
dc.identifier.issue4en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5730
dc.identifier.volume77en_US
dc.language.isoenen_US
dc.publisherSpringer New York LLCen_US
dc.relation.urihttp://dx.doi.org/10.1140/epjc/s10052-017-4766-0
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2017 CERN, for the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceEuropean Physical Journal C
dc.subjectQuarksen_US
dc.subjectProton-proton interactionsen_US
dc.subjectJets (Nuclear physics)en_US
dc.subjectTransverse momentumen_US
dc.subjectQuantum chromodynamicsen_US
dc.subjectKinematicsen_US
dc.titleMeasurement of the W Boson Polarisation in tt̅ events from pp Collisions at √s̅ = 8 TeV in the Lepton + Jets Channel with ATLASen_US
dc.type.genrearticleen_US

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