Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method

Simple item page
dc.contributor.authorAad, G
dc.contributor.authorAbbott, B
dc.contributor.authorAbdallah, J
dc.contributor.authorAbdinov, O
dc.contributor.authorAben, R
dc.contributor.authorAbolins, M
dc.contributor.authorAbouZeid, O S
dc.contributor.authorAbramowicz, H
dc.contributor.authorAbreu, H
dc.contributor.authorAbreu, R
dc.contributor.authorAbulaiti, Y
dc.contributor.authorAcharya, B S
dc.contributor.authorAdamczyk, L
dc.contributor.authorAdams, D L
dc.contributor.authorAdelman, J
dc.contributor.authorAdomeit, S
dc.contributor.authorAdye, T
dc.contributor.authorAffolder, A A
dc.contributor.authorAgatonovic-Jovin, T
dc.contributor.authorAgricola, J
dc.contributor.authorAguilar-Saavedra, J A
dc.contributor.authorAhlen, S P
dc.contributor.authorAhmadov, F
dc.contributor.authorAielli, G
dc.contributor.authorAkerstedt, H
dc.contributor.authorÅkesson, T P A
dc.contributor.authorAkimov, A V
dc.contributor.authorAlberghi, G L
dc.contributor.authorAlbert, J
dc.contributor.authorAlbrand, S
dc.contributor.authorAlconada Verzini, M J
dc.contributor.authorAleksa, M
dc.date.accessioned2021-10-08T07:11:46Z
dc.date.available2021-10-08T07:11:46Z
dc.date.issued2016
dc.description.abstractThis Letter presents evidence for single top-quark production in the s-channel using proton– proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The analysis is performed on events containing one isolated electron or muon, large missing transverse momentum and exactly two b-tagged jets in the final state. The analysed data set corresponds to an integrated luminosity of 20.3 fb−1 . The signal is extracted using a maximum-likelihood fit of a discriminant which is based on the matrix element method and optimized in order to separate single-top-quark s-channel events from the main background contributions, which are top-quark pair production and W boson production in association with heavy-flavour jets. The measurement leads to an observed signal significance of 3.2 standard deviations and a measured cross-section of σs = 4.8±0.8(stat.)+1.6 −1.3 (syst.) pb, which is consistent with the Standard Model expectation. The expected significance for the analysis is 3.9 standard deviations.
dc.identifier.apacitationAad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., ... Aleksa, M. (2016). Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method. <i>Physics Letters, B</i>, 756(C), 228 - 246. http://hdl.handle.net/11427/34684en_ZA
dc.identifier.chicagocitationAad, G, B Abbott, J Abdallah, O Abdinov, R Aben, M Abolins, O S AbouZeid, et al "Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method." <i>Physics Letters, B</i> 756, C. (2016): 228 - 246. http://hdl.handle.net/11427/34684en_ZA
dc.identifier.citationAad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., AbouZeid, O.S. & Abramowicz, H. et al. 2016. Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method. <i>Physics Letters, B.</i> 756(C):228 - 246. http://hdl.handle.net/11427/34684en_ZA
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.ris TY - Journal Article AU - Aad, G AU - Abbott, B AU - Abdallah, J AU - Abdinov, O AU - Aben, R AU - Abolins, M AU - AbouZeid, O S AU - Abramowicz, H AU - Abreu, H AU - Abreu, R AU - Abulaiti, Y AU - Acharya, B S AU - Adamczyk, L AU - Adams, D L AU - Adelman, J AU - Adomeit, S AU - Adye, T AU - Affolder, A A AU - Agatonovic-Jovin, T AU - Agricola, J AU - Aguilar-Saavedra, J A AU - Ahlen, S P AU - Ahmadov, F AU - Aielli, G AU - Akerstedt, H AU - Åkesson, T P A AU - Akimov, A V AU - Alberghi, G L AU - Albert, J AU - Albrand, S AU - Alconada Verzini, M J AU - Aleksa, M AB - This Letter presents evidence for single top-quark production in the s-channel using proton– proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The analysis is performed on events containing one isolated electron or muon, large missing transverse momentum and exactly two b-tagged jets in the final state. The analysed data set corresponds to an integrated luminosity of 20.3 fb−1 . The signal is extracted using a maximum-likelihood fit of a discriminant which is based on the matrix element method and optimized in order to separate single-top-quark s-channel events from the main background contributions, which are top-quark pair production and W boson production in association with heavy-flavour jets. The measurement leads to an observed signal significance of 3.2 standard deviations and a measured cross-section of σs = 4.8±0.8(stat.)+1.6 −1.3 (syst.) pb, which is consistent with the Standard Model expectation. The expected significance for the analysis is 3.9 standard deviations. DA - 2016 DB - OpenUCT DP - University of Cape Town IS - C J1 - Physics Letters, B LK - https://open.uct.ac.za PY - 2016 SM - 0370-2693 SM - 1873-2445 T1 - Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method TI - Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method UR - http://hdl.handle.net/11427/34684 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34684
dc.identifier.vancouvercitationAad G, Abbott B, Abdallah J, Abdinov O, Aben R, Abolins M, et al. Evidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method. Physics Letters, B. 2016;756(C):228 - 246. http://hdl.handle.net/11427/34684.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Physics
dc.publisher.facultyFaculty of Science
dc.sourcePhysics Letters, B
dc.source.journalissueC
dc.source.journalvolume756
dc.source.pagination228 - 246
dc.source.urihttps://dx.doi.org/10.1016/j.physletb.2016.03.017
dc.subject.otherHadron Colliders
dc.subject.otherParton Distributions
dc.subject.otherLikelihood Method
dc.subject.otherMissing Momentum
dc.subject.otherCross-Section
dc.subject.otherLHC
dc.subject.otherReconstruction
dc.subject.otherAlgorithm
dc.subject.otherEvents
dc.subject.otherSearch
dc.subject.otherarticle
dc.titleEvidence for single top-quark production in the s-channel in proton–proton collisions at √s=8TeVwith the ATLAS detector using the Matrix Element Method
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
AadG_Evidence_for_si_2016.pdf
Size:
1.45 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Journal Articles