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Search for dark matter in association with a Higgs boson decaying to b-quarks in pp collisions at √s = 13 TeV with the ATLAS detector

  • Author(s): Aaboud, M;
  • Aad, G;
  • Abbott, B;
  • Abdallah, J;
  • Abdinov, O;
  • Abeloos, B;
  • Aben, R;
  • AbouZeid, OS;
  • Abraham, NL;
  • Abramowicz, H;
  • Abreu, H;
  • Abreu, R;
  • Abulaiti, Y;
  • Acharya, BS;
  • Adamczyk, L;
  • Adams, DL;
  • Adelman, J;
  • Adomeit, S;
  • Adye, T;
  • Affolder, AA;
  • Agatonovic-Jovin, T;
  • Agricola, J;
  • Aguilar-Saavedra, JA;
  • Ahlen, SP;
  • Ahmadov, F;
  • Aielli, G;
  • Akerstedt, H;
  • Åkesson, TPA;
  • Akimov, AV;
  • Alberghi, GL;
  • Albert, J;
  • Albrand, S;
  • Alconada Verzini, MJ;
  • 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;
  • Alstaty, M;
  • Alvarez Gonzalez, B;
  • Álvarez Piqueras, D;
  • Alviggi, MG;
  • Amadio, BT;
  • Amako, K;
  • Amaral Coutinho, Y;
  • Amelung, C;
  • Amidei, D;
  • Amor Dos Santos, SP;
  • Amorim, A;
  • Amoroso, S;
  • Amundsen, G;
  • Anastopoulos, C;
  • Ancu, LS;
  • Andari, N;
  • Andeen, T;
  • Anders, CF;
  • Anders, G;
  • Anders, JK;
  • Anderson, KJ;
  • Andreazza, A;
  • Andrei, V;
  • Angelidakis, S;
  • Angelozzi, I;
  • Anger, P;
  • Angerami, A;
  • Anghinolfi, F;
  • Anisenkov, AV;
  • Anjos, N;
  • Annovi, A;
  • Antel, C;
  • Antonelli, M;
  • Antonov, A;
  • Anulli, F;
  • Aoki, M;
  • Aperio Bella, L;
  • Arabidze, G;
  • Arai, Y;
  • Araque, JP;
  • Arce, ATH;
  • Arduh, FA;
  • Arguin, JF;
  • Argyropoulos, S;
  • Arik, M;
  • Armbruster, AJ;
  • Armitage, LJ;
  • Arnaez, O;
  • Arnold, H
  • et al.
Abstract

A search for dark matter pair production in association with a Higgs boson decaying to a pair of bottom quarks is presented, using 3.2 fb−1 of pp collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. The decay of the Higgs boson is reconstructed as a high-momentum bb¯ system with either a pair of small-radius jets, or a single large-radius jet with substructure. The observed data are found to be consistent with the expected backgrounds. Results are interpreted using a simplified model with a Z′ gauge boson mediating the interaction between dark matter and the Standard Model as well as a two-Higgs-doublet model containing an additional Z′ boson which decays to a Standard Model Higgs boson and a new pseudoscalar Higgs boson, the latter decaying into a pair of dark matter particles.

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