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Observation of four...
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Aad, G.CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France,Aix Marseille Univ, CPPM, IN2P3, CNRS, Marseille, France
(author)
Observation of four-top-quark production in the multilepton final state with the ATLAS detector
- Article/chapterEnglish2023
Publisher, publication year, extent ...
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Institute for Ionics,2023
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-223413
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-223413URI
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https://doi.org/10.1140/epjc/s10052-023-11573-0DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-338552URI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-515716URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20231108
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For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-023-11573-0
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This paper presents the observation of four-top-quark () production in proton-proton collisions at the LHC. The analysis is performed using an integrated luminosity of 140 fb−1 at a centre-of-mass energy of 13 TeV collected using the ATLAS detector. Events containing two leptons with the same electric charge or at least three leptons (electrons or muons) are selected. Event kinematics are used to separate signal from background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The observed (expected) significance of the measured signal with respect to the standard model (SM) background-only hypothesis is 6.1 (4.3) standard deviations. The production cross section is measured to be fb, consistent with the SM prediction of 12.0±2.4 fb within 1.8 standard deviations. Data are also used to set limits on the three-top-quark production cross section, being an irreducible background not measured previously, and to constrain the top-Higgs Yukawa coupling and effective field theory operator coefficients that affect production.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Andrean, Stefio Y.,1991-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)stan8823
(author)
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Backman, Filip,1991-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)fiba9596
(author)
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Barranco Navarro, Laura,1990-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)laba6803
(author)
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Bohm, Christian,1946-KTH,Stockholms universitet,Fysikum,Partikel- och astropartikelfysik(Swepub:kth)u128x0hb
(author)
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Clément, Christophe,1972-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)clement
(author)
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Dunne, Katherine,1987-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)duka4053
(author)
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Hellman, Sten,1956-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)sten
(author)
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Ingebretsen Carlson, Tom,1989-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)toca8159
(author)
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Kim, Dongwon,1989-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)doki7224
(author)
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Lee, SuhyunStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)sule7128
(author)
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Lou, Xuanhong,1995-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)xulo6599
(author)
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Milstead, David A.,1970-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)milstead
(author)
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Pasuwan, Patrawan,1990-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ppasu
(author)
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Pereira Sanchez, Laura,1995-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)lape0222
(author)
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Richter, Stefan,1988-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)stri5038
(author)
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Silverstein, Samuel B.,1967-Stockholms universitet,Fysikum(Swepub:su)silver
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Sjölin, Jörgen,1968-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)sjolin
(author)
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Strandberg, Sara,1977-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)strandberg
(author)
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Strübig, Antonia,1985-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)anst7511
(author)
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Valdés Santurio, Eduardo,1984-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)edval
(author)
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Zwalinski, L.CERN, Geneva, Switzerland
(author)
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Leopold, AlexanderKTH,Partikel- och astropartikelfysik(Swepub:kth)u1wx33ov
(author)
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Lundberg, OlofKTH,Partikel- och astropartikelfysik(Swepub:kth)u142u9nh
(author)
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Lund-Jensen, BengtKTH,Partikel- och astropartikelfysik(Swepub:kth)u13bp6vd
(author)
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Shaheen, RabiaKTH,Partikel- och astropartikelfysik(Swepub:kth)u1uqh9ek
(author)
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Strandberg, JonasKTH,Partikel- och astropartikelfysik(Swepub:kth)u1midk9y
(author)
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Asimakopoulou, Eleni M.Uppsala universitet,Högenergifysik(Swepub:uu)eleas553
(author)
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Bergeås Kuutmann, Elin,1980-Uppsala universitet,Högenergifysik(Swepub:uu)elibe340
(author)
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Bokan, PetarUppsala universitet,Högenergifysik,Georg August Univ Gottingen, Phys Inst 2, Gottingen, Germany(Swepub:uu)petbo828
(author)
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Brenner, RichardUppsala universitet,Högenergifysik(Swepub:uu)richbren
(author)
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Ekelöf, TordUppsala universitet,Högenergifysik(Swepub:uu)tordeke
(author)
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Ellajosyula, VenugopalUppsala universitet,Högenergifysik(Swepub:uu)venel845
(author)
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Ellert, MattiasUppsala universitet,Högenergifysik(Swepub:uu)mel03009
(author)
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Ferrari, Arnaud,1973-Uppsala universitet,Högenergifysik(Swepub:uu)arfer499
(author)
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Isacson, Max F.Uppsala universitet,Högenergifysik(Swepub:uu)maxis346
(author)
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Mårtensson, Mikael U. F.Uppsala universitet,Högenergifysik(Swepub:uu)mikma359
(author)
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CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, FranceAix Marseille Univ, CPPM, IN2P3, CNRS, Marseille, France
(creator_code:org_t)
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In:European Physical Journal C: Institute for Ionics83:61434-60441434-6052
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