Artículo
Search for associated production of a Z boson with an invisibly decaying Higgs boson or dark matter candidates at s=13 TeV with the ATLAS detector
Fecha
2022-06-10Registro en:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Volume 829, 10 June 2022, Article number 137066
0370-2693
10.1016/j.physletb.2022.137066
Autor
Aad, G.
Abbott, B.
Abbott, D.C.
Abed Abud, A.
Abeling, K.
Abhayasinghe, D.K.
Abidi, S.H.
Aboulhorma, A.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Abusleme Hoffman, A.C.
Acharya, B.S.
Achkar, B.
Adam, L.
Adam Bourdarios, C.
Adamczyk, L.
Adamek, L.
Addepalli, S.V.
Adelman, J.
Adiguzel, A.
Adorni, S.
Adye, T.
Affolder, A.A.
Afik, Y.
Agapopoulou, C.
Agaras, M.N.
Agarwala, J.
Aggarwal, A.
Agheorghiesei, C.
Aguilar Saavedra, J.A.
Ahmad, A.
Ahmadov, F.
Ahmed, W.S.
Ai, X.
Aielli, G.
Aizenberg, I.
Akatsuka, S.
Akbiyik, M.
Åkesson, T.P.A.
Akimov, A.V.
Al Khoury, K.
Alberghi, G.L.
Albert, J.
Albicocco, P.
Alconada Verzini, M.J.
Alderweireldt, S.
Aleksa, M.
Aleksandrov, I.N.
Alexa, C.
Alexopoulos, T.
Alfonsi, A.
Alfonsi, F.
Alhroob, M.
Ali, B.
Ali, S.
Aliev, M.
Alimonti, G.
Allaire, C.
Allbrooke, B.M.M.
Institución
Resumen
A search for invisible decays of the Higgs boson as well as searches for dark matter candidates, produced together with a leptonically decaying Z boson, are presented. The analysis is performed using proton−proton collisions at a centre-of-mass energy of 13 TeV, delivered by the LHC, corresponding to an integrated luminosity of 139 fb−1 and recorded by the ATLAS experiment. Assuming Standard Model cross-sections for ZH production, the observed (expected) upper limit on the branching ratio of the Higgs boson to invisible particles is found to be 19% (19%) at the 95% confidence level. Exclusion limits are also set for simplified dark matter models and two-Higgs-doublet models with an additional pseudoscalar mediator. © 2022 The Author(s)