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http://bura.brunel.ac.uk/handle/2438/14711
Title: | Search for electroweak production of a vector-like quark decaying to a top quark and a Higgs boson using boosted topologies in fully hadronic final states |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Asilar, E Bergauer, T Brandstetter, J Brondolin, E Dragicevic, M Erö, J Flechl, M Friedl, M Frühwirth, R Ghete, VM Hartl, C Hörmann, N Hrubec, J Jeitler, M König, A Krätschmer, I Liko, D Matsushita, T Mikulec, I Rabady, D Rad, N Rahbaran, B Rohringer, H Schieck, J Strauss, J Waltenberger, W Wulz, CE Chekhovsky, V Dvornikov, O Dydyshka, Y Emeliantchik, I Litomin, A Makarenko, V Mossolov, V Stefanovitch, R Suarez Gonzalez, J Zykunov, V Shumeiko, N Alderweireldt, S De Wolf, EA Janssen, X Lauwers, J Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Van Spilbeeck, A Abu Zeid, S Blekman, F D Hondt, J Daci, N De Bruyn, I Deroover, K Lowette, S Moortgat, S Moreels, L Olbrechts, A Python, Q Skovpen, K Tavernier, S Van Doninck, W Van Mulders, P Van Parijs, I Brun, H Clerbaux, B De Lentdecker, G Delannoy, H Fasanella, G Favart, L Goldouzian, R Grebenyuk, A Karapostoli, G Lenzi, T Léonard, A Luetic, J Maerschalk, T Marinov, A Randle-conde, A Seva, T Vander Velde, C Vanlaer, P Vannerom, D Yonamine, R Zenoni, F Zhang, F Cimmino, A Cornelis, T Dobur, D Fagot, A Gul, M Khvastunov, I Poyraz, D |
Keywords: | Beyond Standard Model;Hadron-Hadron scattering (experiments);Top physics |
Issue Date: | 2017 |
Citation: | Journal of High Energy Physics, 2017, 2017 (4) |
Abstract: | © 2017, The Author(s).A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a standard model top or bottom quark, using 2.3 fb−1 of proton-proton collision data at s=13 TeV collected by the CMS experiment at the CERN LHC. The search targets T quarks decaying to a top quark and a Higgs boson in fully hadronic final states. For a T quark with mass above 1 TeV the daughter top quark and Higgs boson are highly Lorentz-boosted and can each appear as a single hadronic jet. Jet substructure and b tagging techniques are used to identify the top quark and Higgs boson jets, and to suppress the standard model backgrounds. An excess of events is searched for in the T quark candidate mass distribution in the data, which is found to be consistent with the expected backgrounds. Upper limits at 95% confidence level are set on the product of the single T quark production cross sections and the branching fraction ℬ (T → t H) , and these vary between 0.31 and 0.93 pb for T quark masses in the range 1000-1800 GeV. This is the first search for single electroweak production of a vector-like T quark in fully hadronic final states.[Figure not available: see fulltext.]. |
URI: | http://bura.brunel.ac.uk/handle/2438/14711 |
DOI: | http://dx.doi.org/10.1007/JHEP04(2017)136 |
ISSN: | 1126-6708 1029-8479 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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