A search is presented for single production of a vector-like top quark T, decaying into the standard model top quark and Higgs boson, in a final state including two opposite-sign leptons (electrons or muons), jets, and missing transverse momentum. The data were recorded by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC in the years 2016-2018, and corresponding to an integrated luminosity of up to 138 fb^-1. No excess in data over the background expectations is observed. Upper limits at 95% confidence level on the product of the T production cross section and its decay branching fraction to tH are set. The observed limits are 2.0 pb at a T mass MT = 600 GeV and 0.3 pb at MT = 1200 GeV, with a minimum of 0.1 pb at MT = 1000 GeV. This is the first search for single vector-like T quark production, followed by a decay to a top quark and the Higgs boson, in opposite-sign dilepton final states.

Search for single vector-like quark production in opposite-sign dilepton final states in proton-proton collisions at √s = 13 TeV / Null, N., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Benato, L., Bergauer, T., Dragicevic, M., Hussain, P.S., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Schieck, J., Schöfbeck, R., Shooshtari, M., Sonawane, M., Waltenberger, W., Wulz, C.-E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:9(2026 Sep), pp. 1-37. [10.1007/jhep09(2026)230]

Search for single vector-like quark production in opposite-sign dilepton final states in proton-proton collisions at √s = 13 TeV

Akrap, P.;Basile, C.;Cunqueiro Mendez, L.;De Riggi, F.;Del Re, D.;Del Vecchio, M.;Di Marco, E.;Frosina, L.;Gargiulo, R.;Harikrishnan, B.;Lombardi, F.;Longo, E.;Martikainen, L.;Organtini, G.;Palmeri, N.;Paramatti, R.;Pauletto, T.;Rahatlou, S.;Santanastasio, F.;Vladimirov, V.;
2026

Abstract

A search is presented for single production of a vector-like top quark T, decaying into the standard model top quark and Higgs boson, in a final state including two opposite-sign leptons (electrons or muons), jets, and missing transverse momentum. The data were recorded by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC in the years 2016-2018, and corresponding to an integrated luminosity of up to 138 fb^-1. No excess in data over the background expectations is observed. Upper limits at 95% confidence level on the product of the T production cross section and its decay branching fraction to tH are set. The observed limits are 2.0 pb at a T mass MT = 600 GeV and 0.3 pb at MT = 1200 GeV, with a minimum of 0.1 pb at MT = 1000 GeV. This is the first search for single vector-like T quark production, followed by a decay to a top quark and the Higgs boson, in opposite-sign dilepton final states.
2026-09
beyond standard model; hadron-hadron scattering; vector-like quarks
01 Pubblicazione su rivista::01a Articolo in rivista
Search for single vector-like quark production in opposite-sign dilepton final states in proton-proton collisions at √s = 13 TeV / Null, N., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Benato, L., Bergauer, T., Dragicevic, M., Hussain, P.S., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Schieck, J., Schöfbeck, R., Shooshtari, M., Sonawane, M., Waltenberger, W., Wulz, C.-E., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:9(2026 Sep), pp. 1-37. [10.1007/jhep09(2026)230]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1779876
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