Journal Articles

Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915

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Author: search.filters.author.De Lentdecker GSubject: search.filters.subject.Beyond Standard Model

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    Search for a resonance decaying to a W boson and a photon in proton-proton collisions at s = 13 TeV using leptonic W boson decays
    (Springer Nature, 2024-09-25) Hayrapetyan A; Tumasyan A; Adam W; Andrejkovic JW; Bergauer T; Chatterjee S; Damanakis K; Dragicevic M; Hussain PS; Jeitler M; Krammer N; Li A; Liko D; Mikulec I; Schieck J; Schöfbeck R; Schwarz D; Sonawane M; Templ S; Waltenberger W; Wulz CE; Janssen T; Van Laer T; Van Mechelen P; Breugelmans N; D’Hondt J; Dansana S; De Moor A; Delcourt M; Heyen F; Lowette S; Makarenko I; Müller D; Tavernier S; Tytgat M; Van Onsem GP; Van Putte S; Vannerom D; Bilin B; Clerbaux B; Das AK; De Lentdecker G; Evard H; Favart L; Gianneios P; Jaramillo J; Khalilzadeh A; Khan FA; Lee K; Mahdavikhorrami M; Malara A; Paredes S; Shahzad MA; Thomas L; Vanden Bemden M; Vander Velde C; Vanlaer P; De Coen M; Dobur D; Gokbulut G; Hong Y; Knolle J; Lambrecht L; Marckx D; Mota Amarilo K; Samalan A; Skovpen K; Van Den Bossche N; van der Linden J; Wezenbeek L; Benecke A; Bethani A; Bruno G; Caputo C; De Favereau De Jeneret J; Delaere C; Donertas IS; Giammanco A; Guzel AO; Jain S; Lemaitre V; Lidrych J; Mastrapasqua P; Tran TT; Wertz S; Alves GA; Alves Gallo Pereira M; Coelho E; Correia Silva G; Hensel C; Menezes De Oliveira T; Mora Herrera C; Moraes A; Rebello Teles P; Soeiro M; Vilela Pereira A; Aldá Júnior WL; Barroso Ferreira Filho M; Brandao Malbouisson H; Carvalho W
    A search for a new charged particle X with mass between 0.3 and 2.0 TeV decaying to a W boson and a photon is presented, using proton-proton collision data at a center-of-mass energy of 13 TeV, collected by the CMS experiment and corresponding to an integrated luminosity of 138 fb−1. Particle X has electric charge ±1 and is assumed to have spin 0. The search is performed using the electron and muon decays of the W boson. No significant excess above the predicted background is observed. The upper limit at 95% confidence level on the product of the production cross section of the X and its branching fraction to a W boson and a photon is found to be 94 (137) fb for a 0.3 TeV resonance and 0.75 (0.81) fb for a 2.0 TeV resonance, for an X width-to-mass ratio of 0.01% (5%). This search presents the most stringent constraints to date on the existence of such resonances across the probed mass range. A statistical combination with an earlier study based on the hadronic decay mode of the W boson is also performed, and the upper limit at 95% confidence level for a 2.0 TeV resonance is reduced to 0.50 (0.63) fb for an X width-to-mass ratio of 0.01% (5%).
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    Search for single production of vector-like quarks decaying to a b quark and a Higgs boson
    (Springer Nature, 2018-06-05) Sirunyan AM; Tumasyan A; Adam W; Ambrogi F; Asilar E; Bergauer T; Brandstetter J; Brondolin E; Dragicevic M; Erö J; Escalante Del Valle A; Flechl M; Friedl M; Frühwirth R; Ghete VM; Grossmann J; Hrubec J; Jeitler M; König A; Krammer N; Krätschmer I; Liko D; Madlener T; Mikulec I; Pree E; Rad N; Rohringer H; Schieck J; Schöfbeck R; Spanring M; Spitzbart D; Taurok A; Waltenberger W; Wittmann J; Wulz CE; Zarucki M; Chekhovsky V; Mossolov V; Suarez Gonzalez J; De Wolf EA; Di Croce D; Janssen X; Lauwers J; Van De Klundert M; Van Haevermaet H; Van Mechelen P; Van Remortel N; Abu Zeid S; Blekman F; D’Hondt J; De Bruyn I; De Clercq J; Deroover K; Flouris G; Lontkovskyi D; Lowette S; Marchesini I; Moortgat S; Moreels L; Python Q; Skovpen K; Tavernier S; Van Doninck W; Van Mulders P; Van Parijs I; Beghin D; Bilin B; Brun H; Clerbaux B; De Lentdecker G; Delannoy H; Dorney B; Fasanella G; Favart L; Goldouzian R; Grebenyuk A; Kalsi AK; Lenzi T; Luetic J; Maerschalk T; Marinov A; Seva T; Starling E; Vander Velde C; Vanlaer P; Vannerom D; Yonamine R; Zenoni F; Cornelis T; Dobur D; Fagot A; Gul M; Khvastunov I; Poyraz D; Roskas C; Salva S; Trocino D; Tytgat M; Verbeke W; Vit M
    A search is presented for single production of heavy vector-like quarks (B) that decay to a Higgs boson and a b quark, with the Higgs boson decaying to a highly boosted b b ¯ pair reconstructed as a single collimated jet. The analysis is based on data collected by the CMS experiment in proton-proton collisions at s=13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. The data are consistent with background expectations, and upper limits at 95% confidence level on the product of the B quark cross section and the branching fraction are obtained in the range 1.28–0.07 pb, for a narrow B quark with a mass between 700 and 1800 GeV. The production of B quarks with widths of 10, 20 and 30% of the resonance mass is also considered, and the sensitivities obtained are similar to those achieved in the narrow width case. This is the first search at the CERN LHC for the single production of a B quark through its fully hadronic decay channel, and the first study considering finite resonance widths of the B quark.