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Article: Measurement of the ttZ and ttW cross sections in proton-proton collisions at √s=13 TeV with the ATLAS detector

TitleMeasurement of the ttZ and ttW cross sections in proton-proton collisions at √s=13 TeV with the ATLAS detector
Authors
Issue Date2019
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prd/
Citation
Physical Review D: covering particles, fields, gravitation, and cosmology, 2019, v. 99 n. 7, article no. 072009, p. 1-38 How to Cite?
AbstractA measurement of the associated production of a top-quark pair (t (t) over bar) with a vector boson (W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using 36.1 fb(-1) of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The t (t) over barZ and t (t) over barW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are sigma(t (t) over barZ) = 0.95 +/- 0.08(stat )+/- 0.10(syst) pb and sigma(t (t) over barW) = 0.87 +/- 0.13(stat) +/- 0.14(syst) pb in agreement with the Standard Model predictions. The measurement of the t (t) over barZ cross section is used to set constraints on effective field theory operators which modify the t (t) over barZ vertex.
Persistent Identifierhttp://hdl.handle.net/10722/271268
ISSN
2020 Impact Factor: 5.296
2020 SCImago Journal Rankings: 1.887
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorATLAS Collaboration-
dc.contributor.authorLo, CY-
dc.contributor.authorOrlando, N-
dc.contributor.authorParedes Hernandez, DK-
dc.contributor.authorTu, Y-
dc.date.accessioned2019-06-24T01:06:37Z-
dc.date.available2019-06-24T01:06:37Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review D: covering particles, fields, gravitation, and cosmology, 2019, v. 99 n. 7, article no. 072009, p. 1-38-
dc.identifier.issn2470-0010-
dc.identifier.urihttp://hdl.handle.net/10722/271268-
dc.description.abstractA measurement of the associated production of a top-quark pair (t (t) over bar) with a vector boson (W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using 36.1 fb(-1) of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The t (t) over barZ and t (t) over barW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are sigma(t (t) over barZ) = 0.95 +/- 0.08(stat )+/- 0.10(syst) pb and sigma(t (t) over barW) = 0.87 +/- 0.13(stat) +/- 0.14(syst) pb in agreement with the Standard Model predictions. The measurement of the t (t) over barZ cross section is used to set constraints on effective field theory operators which modify the t (t) over barZ vertex.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prd/-
dc.relation.ispartofPhysical Review D: covering particles, fields, gravitation, and cosmology-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleMeasurement of the ttZ and ttW cross sections in proton-proton collisions at √s=13 TeV with the ATLAS detector-
dc.typeArticle-
dc.identifier.emailOrlando, N: Norlando@hku.hk-
dc.identifier.emailParedes Hernandez, DK: dparedes@hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevD.99.072009-
dc.identifier.scopuseid_2-s2.0-85072076489-
dc.identifier.hkuros298060-
dc.identifier.volume99-
dc.identifier.issue7-
dc.identifier.spagearticle no. 072009, p. 1-
dc.identifier.epagearticle no. 072009, p. 38-
dc.identifier.isiWOS:000466421900001-
dc.publisher.placeUnited States-
dc.identifier.issnl2470-0010-

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