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Aad, G.Univ Calif Berkeley, Berkeley, CA USA.;Univ Bucharest, Fac Phys, Bucharest, Romania.;IThemba Labs, Western Cape, South Africa.;Univ Cadi Ayyad, Fac Sci Semlalia, LPHEA, Marrakech, Morocco.;New York Univ Abu Dhabi, Abu Dhabi, U Arab Emirates.;Univ Georgia, Tbilisi, Georgia.
(author)
Search for a new scalar resonance in flavour-changing neutral-current top-quark decays t -> qX (q = u, c), with X -> b(b)over-bar, in proton-proton collisions at root s=13 TeV with the ATLAS detector
- Article/chapterEnglish2023
Publisher, publication year, extent ...
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Springer,2023
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-515702
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-515702URI
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https://doi.org/10.1007/JHEP07(2023)199DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-339384URI
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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For complete list of authors see http://dx.doi.org/10.1007/JHEP07(2023)199
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QC 20231108
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A search for flavour-changing neutral-current decays of a top quark into an up-type quark (either up or charm) and a light scalar particle X decaying into a bottom anti-bottom quark pair is presented. The search focuses on top-quark pair production where one top quark decays to qX, with X -> b (b) over bar, and the other top quark decays according to the Standard Model, with the W boson decaying leptonically. The final state is thus characterised by an isolated electron or muon and at least four jets. Events are categorised according to the multiplicity of jets and jets tagged as originating from b-quarks, and a neural network is used to discriminate between signal and background processes. The data analysed correspond to 139 fb(-1) of proton-proton collisions at a centre-of-mass energy of 13TeV, recorded with the ATLAS detector at the LHC. The 95% confidence-level upper limits between 0.019% and 0.062% are derived for the branching fraction B(t -> uX) and between 0.018% and 0.078% for the branching fraction B(t -> cX), for masses of the scalar particle X between 20 and 160 GeV.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Bergeås Kuutmann, Elin,1980-Uppsala universitet,Högenergifysik(Swepub:uu)elibe340
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Brenner, RichardUppsala universitet,Högenergifysik(Swepub:uu)richbren
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Dimitriadi, ChristinaUppsala universitet,Högenergifysik,Univ Bonn, Phys Inst, Bonn, Germany(Swepub:uu)chrdi726
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Ekelöf, TordUppsala universitet,Högenergifysik(Swepub:uu)tordeke
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Ellajosyula, VenugopalUppsala universitet,Högenergifysik(Swepub:uu)venel845
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Ellert, MattiasUppsala universitet,Högenergifysik(Swepub:uu)mel03009
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Ferrari, Arnaud,1973-Uppsala universitet,Högenergifysik(Swepub:uu)arfer499
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Gonzalez Suarez, RebecaUppsala universitet,Högenergifysik(Swepub:uu)rebgo209
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Mathisen, ThomasUppsala universitet,Högenergifysik(Swepub:uu)thoma814
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Ördek, SerhatUppsala universitet,Högenergifysik(Swepub:uu)seror924
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Steentoft, JonasUppsala universitet,Högenergifysik(Swepub:uu)jonst734
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Sunneborn Gudnadottir, OlgaUppsala universitet,Högenergifysik(Swepub:uu)olggu198
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Zwalinski, L.CERN, Geneva, Switzerland.
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Leopold, AlexanderKTH,Partikel- och astropartikelfysik(Swepub:kth)u1wx33ov
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Lundberg, OlofKTH,Partikel- och astropartikelfysik(Swepub:kth)u142u9nh
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Lund-Jensen, BengtKTH,Partikel- och astropartikelfysik,Royal Inst Technol, Dept Phys, Stockholm, Sweden.(Swepub:kth)u13bp6vd
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Ohm, ChristianKTH,Partikel- och astropartikelfysik(Swepub:kth)u128x0hb
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Ripellino, GiuliaKTH,Partikel- och astropartikelfysik,Royal Inst Technol, Dept Phys, Stockholm, Sweden.(Swepub:kth)u13f31yo
(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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Univ Calif Berkeley, Berkeley, CA USA.;Univ Bucharest, Fac Phys, Bucharest, Romania.;IThemba Labs, Western Cape, South Africa.;Univ Cadi Ayyad, Fac Sci Semlalia, LPHEA, Marrakech, Morocco.;New York Univ Abu Dhabi, Abu Dhabi, U Arab Emirates.;Univ Georgia, Tbilisi, Georgia.Högenergifysik
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In:Journal of High Energy Physics (JHEP): Springer1126-67081029-8479
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Ellert, Mattias
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