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http://bura.brunel.ac.uk/handle/2438/17579
Title: | Search for single production of vector-like quarks decaying to a top quark and a W boson in proton–proton collisions at √s=13TeV |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Asilar, E Bergauer, T Brandstetter, J Dragicevic, M Erö, J Del Valle, AE Flechl, M Frühwirth, R Ghete, VM Hrubec, J Jeitler, M Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I 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 Gonzalez, JS De Wolf, EA Di Croce, D Janssen, X Lauwers, J Pieters, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Zeid, SA Blekman, F D Hondt, J 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 Postiau, N Starling, E Thomas, L Velde, CV Vanlaer, P Vannerom, D Wang, Q Cornelis, T Dobur, D Fagot, A Gul, M Khvastunov, I Poyraz, D Roskas, C Trocino, D Tytgat, M Verbeke, W Vermassen, B Vit, M Zaganidis, N Bakhshiansohi, H Bondu, O Brochet, S Bruno, G Caputo, C David, P Delaere, C |
Keywords: | pp collisions;Parton showers;Atlas detector;Higgs boson;t quark;physics |
Issue Date: | Jan-2019 |
Publisher: | Springer |
Citation: | European Physical Journal C, 2019, 79 (2) |
Abstract: | A search is presented for the single production of vector-like quarks in proton–proton collisions at s=13TeV. The data, corresponding to an integrated luminosity of 35.9fb-1, were recorded with the CMS experiment at the LHC. The analysis focuses on the vector-like quark decay into a top quark and a W boson, with one muon or electron in the final state. The mass of the vector-like quark candidate is reconstructed from hadronic jets, the lepton, and the missing transverse momentum. Methods for the identification of b quarks and of highly Lorentz boosted hadronically decaying top quarks and W bosons are exploited in this search. No significant deviation from the standard model background expectation is observed. Exclusion limits at 95% confidence level are set on the product of the production cross section and branching fraction as a function of the vector-like quark mass, which range from 0.3 to 0.03pb for vector-like quark masses of 700 to 2000GeV. Mass exclusion limits up to 1660GeV are obtained, depending on the vector-like quark type, coupling, and decay width. These represent the most stringent exclusion limits for the single production of vector-like quarks in this channel. |
Description: | © 2019, CERN for the benefit of the CMS collaboration. |
URI: | https://bura.brunel.ac.uk/handle/2438/17579 |
DOI: | https://doi.org/10.1140/epjc/s10052-019-6556-3 |
ISSN: | 1434-6044 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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