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    Measurement of the production cross-section of a single top quark in association with a Z boson in proton-proton collisions at 13 TeV with the ATLAS detector

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    Author
    Aaboud, M.
    Aad, G.
    Abbott, B.
    Abdinov, O.
    Abeloos, B.
    Abidi, S.H.
    AbouZeid, O.S.
    Abraham, N.L.
    Abramowicz, H.
    Abreu, H.
    Abreu, R.
    Abulaiti, Y.
    Acharya, B.S.
    Adachi, S.
    Adamczyk, L.
    Adelman, J.
    Adersberger, M.
    Adye, T.
    Affolder, A.A.
    Afik, Y.
    Agatonovic-Jovin, T.
    Agheorghiesei, C.
    Aguilar-Saavedra, J.A.
    Ahlen, S.P.
    Ahmadov, F.
    Aielli, G.
    Akatsuka, S.
    Akerstedt, H.
    Åkesson, T.P.A.
    Akilli, E.
    Akimov, A.V.
    Alberghi, G.L.
    Albert, J.
    Albicocco, P.
    Alconada Verzini, M.J.
    Alderweireldt, S.C.
    Aleksa, M.
    Aleksandrov, I.N.
    Alexa, C.
    Alexander, G.
    Alexopoulos, T.
    Alhroob, M.
    Ali, B.
    Aliev, M.
    Alimonti, G.
    Alison, J.
    Alkire, S.P.
    Allbrooke, B.M.M.
    Allen, B.W.
    Allport, P.P.
    Aloisio, A.
    Alonso, A.
    Alonso, F.
    Alpigiani, C.
    Alshehri, A.A.
    Alstaty, M.I.
    Alvarez Gonzalez, B.
    Álvarez Piqueras, D.
    Alviggi, M.G.
    Amadio, B.T.
    Amaral Coutinho, Y.
    Amelung, C.
    Amidei, D.
    Amor Dos Santos, S.P.
    Amoroso, S.
    Amundsen, G.
    Anastopoulos, C.
    Ancu, L.S.
    Andari, N.
    Andeen, T.
    Anders, C.F.
    Anders, J.K.
    Anderson, K.J.
    Andreazza, A.
    Andrei, V.
    Angelidakis, S.
    Angelozzi, I.
    Angerami, A.
    Anisenkov, A.V.
    Anjos, N.
    Annovi, A.
    Antel, C.
    Antonelli, M.
    Antonov, A.
    Antrim, D.J.
    Anulli, F.
    Aoki, M.
    Aperio Bella, L.
    Arabidze, G.
    Arai, Y.
    Araque, J.P.
    Araujo Ferraz, V.
    Arce, A.T.H.
    Ardell, R.E.
    Arduh, F.A.
    Arguin, J-F.
    Argyropoulos, S.
    Arik, M.
    Armbruster, A.J.
    Armitage, L.J.
    Cheu, E.
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    Affiliation
    Univ Arizona, Dept Phys
    Issue Date
    2018-05-10
    
    Metadata
    Show full item record
    Publisher
    ELSEVIER SCIENCE BV
    Citation
    Allbrooke, B. M. M., Asquith, L., Cerri, A., Chavez Barajas, C. A., Santoyo Castillo, I., Suruliz, K., ... & , ATLAS Collaboration. (2018). Measurement of the production cross-section of a single top quark in association with a Z boson in proton-proton collisions at 13 TeV with the ATLAS detector. Physics Letters B, 780, 557-577. https://doi.org/10.1016/j.physletb.2018.03.023
    Journal
    PHYSICS LETTERS B
    Rights
    © 2018 The Author(s). Published by Elsevier B.V.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The production of a top quark in association with a Z boson is investigated. The proton-proton collision data collected by the ATLAS experiment at the LHC in 2015 and 2016 at a centre-of-mass energy of root s = 13 TeV are used, corresponding to an integrated luminosity of 36.1 fb(-1). Events containing three identified leptons (electrons and/or muons) and two jets, one of which is identified as a b-quark jet are selected. The major backgrounds are diboson, tt($)over-bar and Z + jets production. A neural network is used to improve the background rejection and extract the signal. The resulting significance is 4.2 sigma in the data and the expected significance is 5.4 sigma. The measured cross-section for tZq production is 600 +/- 170(stat.)+/- 140(syst.)fb. (C) 2018 The Author(s). Published by Elsevier B.V.
    Note
    Open access journal.
    ISSN
    03702693
    DOI
    10.1016/j.physletb.2018.03.023
    Version
    Final published version
    Sponsors
    ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW, Austria; FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq, Brazil; FAPESP, Brazil; NSERC, Canada; NRC, Canada; CFI, Canada; CERN; CONICYT, Chile; CAS, China; MOST, China; NSFC, China; COLCIENCIAS, Colombia; MSMT CR, Czech Republic; MPO CR, Czech Republic; VSC CR, Czech Republic; DNRF, Denmark; DNSRC, Denmark; IN2P3-CNRS, France; CEA-DSM/IRFU, France; SRNSF, Georgia; BMBF, Germany; HGF, Germany; MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, Israel; I-CORE, Israel; Benoziyo Center, Israel; INFN, Italy; MEXT, Japan; JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW, Poland; NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia; NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS, Slovenia; MIA, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; SERI, Switzerland; SNSF, Switzerland; Canton of Bern Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE, United States of America; NSF, United States of America; BCKDF, Canada; Canada Council, Canada; Canarie, Canada; CRC, Canada; Compute Canada, Canada; FQRNT, Canada; Ontario Innovation Trust, Canada; EPLANET, European Union; ERC, European Union; ERDF, European Union; FP7, European Union; Horizon, European Union; Investissements d'Avenir Labex, ANR, France; Investissements d'Avenir Idex, ANR,France; Region Auvergne, France; Fondation Partager le Savoir, France; DFG, Germany; AvH Foundation, Germany; EU-ESF; Greek NSRF; BSF, Israel; GIF, Israel; Minerva, Israel; BRF, Norway; CERCA Programme Generalitat de Catalunya, Spain; Generalitat Valenciana, Spain; Royal Society, United Kingdom; Leverhulme Trust, United Kingdom; Marie Sklodowska-Curie Actions, European Union; Canton of Geneva, Switzerland
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0370269318302120
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.physletb.2018.03.023
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