Search for heavy resonances decaying into a Z or W boson and a Higgs boson in final states with leptons and b-jets in 139 fb−1 of pp collisions at √s = 13 TeV with the ATLAS detector

• Main Authors: Abidi, S.H, Abusleme Hoffman, Hoffman, Agheorghiesei, C, Alexopoulos, T, Andari, N, Antel, C, Anthony, M.T, Austrup, V.A, Balaji, S, Barak, L, Bartoldus, R, Beauchemin, P.H, Benhammou, Y, Benoit, M, Bergmann, B, Berthold, A, Blumenthal, J, Borbély, A.G, Bruscino, N, Cai, H, Calafiura, P, Calvet, D, Carlson, B.T, Casado, M.P, Chen, J, Crépé-Renaudin, S, Cui, Z, D’Auria, S, De Salvo, Salvo, Delsart, P.A, Di Donato, Donato, Didenko, M, Elsing, M, Ferrando, J, Filthaut, F, Freegard, A.C, Gadow, P, Geisen, J, Guo, J, Han, K, Han, Y.F, Hommels, L.B.A.H, Jagfeld, C.S, Jakobs, K, Jiang, Y, Kempster, J.J, Khoriauli, G, Klein, C, Koperny, S, Krieter, F, Kumar, M, Lampl, W, Lee, S, Longo, R, Lu, S, Magro, J, Maniatis, I.M, Manjarres Ramos, Ramos, Martoiu, V.S, McLean, K.D, Meyer, C, Moskvitina, P, Nelson, K, Nikiforou, N, Okumura, Y, Öncel, O.O, Pacheco Pages, Pages, Panduro Vazquez, Vazquez, Pernegger, H, Pietreanu, D, Reznicek, P, Røhne, Ole Myren, Ruby, A.J, Schillaci, Z.M, Schioppa, E.J, Schwemling, Ph, Serin, L, Sidoti, A, Siral, I, Spinali, S, Stavropoulos, G, Sugizaki, K, Swiatlowski, M, Tackmann, K, Takeda, K, Tian, Y, Togawa, M, Tsybychev, D, Urban, J, Usman, M, Valderanis, C, Villaplana Perez, Perez, Weber, M.S, Weiser, C, Wessels, M, Xella, S, Xiao, X, Yacoob, S, Ziolkowski, M, Zormpa, O
• Format: Article
• Language: English

This article presents a search for new resonances decaying into a Z or W boson and a 125 GeV Higgs boson h, and it targets the νν¯¯¯bb¯¯ , ℓ+ℓ−bb¯¯ , or ℓ±νbb¯¯ final states, where ℓ = e or μ, in proton-proton collisions at s√ = 13 TeV. The data used correspond to a total integrated luminosity of 139 fb−1 collected by the ATLAS detector during Run 2 of the LHC at CERN. The search is conducted by examining the reconstructed invariant or transverse mass distributions of Zh or Wh candidates for evidence of a localised excess in the mass range from 220 GeV to 5 TeV. No significant excess is observed and 95% confidence-level upper limits between 1.3 pb and 0.3 fb are placed on the production cross section times branching fraction of neutral and charged spin-1 resonances and CP-odd scalar bosons. These limits are converted into constraints on the parameter space of the Heavy Vector Triplet model and the two-Higgs-doublet model.