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Search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb−1 of √s=13 TeV pp collisions with the ATLAS detector

  • Author(s): Aaboud, M;
  • Aad, G;
  • Abbott, B;
  • Abdinov, O;
  • Abeloos, B;
  • Abidi, SH;
  • AbouZeid, OS;
  • Abraham, NL;
  • Abramowicz, H;
  • Abreu, H;
  • Abreu, R;
  • Abulaiti, Y;
  • Acharya, BS;
  • Adachi, S;
  • Adamczyk, L;
  • Adelman, J;
  • Adersberger, M;
  • Adye, T;
  • Affolder, AA;
  • Afik, Y;
  • Agatonovic-Jovin, T;
  • Agheorghiesei, C;
  • Aguilar-Saavedra, JA;
  • Ahlen, SP;
  • Ahmadov, F;
  • Aielli, G;
  • Akatsuka, S;
  • Akerstedt, H;
  • Åkesson, TPA;
  • Akilli, E;
  • Akimov, AV;
  • Alberghi, GL;
  • Albert, J;
  • Albicocco, P;
  • Alconada Verzini, MJ;
  • Alderweireldt, SC;
  • Aleksa, M;
  • Aleksandrov, IN;
  • Alexa, C;
  • Alexander, G;
  • Alexopoulos, T;
  • Alhroob, M;
  • Ali, B;
  • Aliev, M;
  • Alimonti, G;
  • Alison, J;
  • Alkire, SP;
  • Allbrooke, BMM;
  • Allen, BW;
  • Allport, PP;
  • Aloisio, A;
  • Alonso, A;
  • Alonso, F;
  • Alpigiani, C;
  • Alshehri, AA;
  • Alstaty, MI;
  • Alvarez Gonzalez, B;
  • Álvarez Piqueras, D;
  • Alviggi, MG;
  • Amadio, BT;
  • Amaral Coutinho, Y;
  • Amelung, C;
  • Amidei, D;
  • Amor Dos Santos, SP;
  • Amoroso, S;
  • Amundsen, G;
  • Anastopoulos, C;
  • Ancu, LS;
  • Andari, N;
  • Andeen, T;
  • Anders, CF;
  • Anders, JK;
  • Anderson, KJ;
  • Andreazza, A;
  • Andrei, V;
  • Angelidakis, S;
  • Angelozzi, I;
  • Angerami, A;
  • Anisenkov, AV;
  • Anjos, N;
  • Annovi, A;
  • Antel, C;
  • Antonelli, M;
  • Antonov, A;
  • Antrim, DJ;
  • Anulli, F;
  • Aoki, M;
  • Aperio Bella, L;
  • Arabidze, G;
  • Arai, Y;
  • Araque, JP;
  • Araujo Ferraz, V;
  • Arce, ATH;
  • Ardell, RE;
  • Arduh, FA;
  • Arguin, JF;
  • Argyropoulos, S;
  • Arik, M;
  • Armbruster, AJ;
  • Armitage, LJ
  • et al.
Abstract

A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the νν¯ bb¯ , ℓ±νbb¯ , and ℓ+ℓ−bb¯ final states, where ℓ± = e± or μ±, in pp collisions at s=13 TeV. The data used correspond to a total integrated luminosity of 36.1 fb−1 collected with the ATLAS detector at the Large Hadron Collider during the 2015 and 2016 data-taking periods. The search is conducted by examining the reconstructed invariant or transverse mass distributions of W h and Zh candidates for evidence of a localised excess in the mass range of 220 GeV up to 5 TeV. No significant excess is observed and the results are interpreted in terms of constraints on the production cross-section times branching fraction of heavy W′ and Z′ resonances in heavy-vector-triplet models and the CP-odd scalar boson A in two-Higgs-doublet models. Upper limits are placed at the 95% confidence level and range between 9.0 × 10−4 pb and 7.3 × 10−1 pb depending on the model and mass of the resonance.[Figure not available: see fulltext.].

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