- Main
Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at s =13 TeV
- Aad, G;
- Abbott, B;
- Abbott, DC;
- Abed Abud, A;
- Abeling, K;
- Abhayasinghe, DK;
- Abidi, SH;
- Aboulhorma, A;
- Abramowicz, H;
- Abreu, H;
- Abulaiti, Y;
- Abusleme Hoffman, AC;
- Acharya, BS;
- Achkar, B;
- Adam, L;
- Adam Bourdarios, C;
- Adamczyk, L;
- Adamek, L;
- Addepalli, SV;
- Adelman, J;
- Adiguzel, A;
- Adorni, S;
- Adye, T;
- Affolder, AA;
- Afik, Y;
- Agapopoulou, C;
- Agaras, MN;
- Agarwala, J;
- Aggarwal, A;
- Agheorghiesei, C;
- Aguilar-Saavedra, JA;
- Ahmad, A;
- Ahmadov, F;
- Ahmed, WS;
- Ai, X;
- Aielli, G;
- Aizenberg, I;
- Akatsuka, S;
- Akbiyik, M;
- Åkesson, TPA;
- Akimov, AV;
- Al Khoury, K;
- Alberghi, GL;
- Albert, J;
- Albicocco, P;
- Alconada Verzini, MJ;
- Alderweireldt, S;
- Aleksa, M;
- Aleksandrov, IN;
- Alexa, C;
- Alexopoulos, T;
- Alfonsi, A;
- Alfonsi, F;
- Alhroob, M;
- Ali, B;
- Ali, S;
- Aliev, M;
- Alimonti, G;
- Allaire, C;
- Allbrooke, BMM;
- Allport, PP;
- Aloisio, A;
- Alonso, F;
- Alpigiani, C;
- Alunno Camelia, E;
- Alvarez Estevez, M;
- Alviggi, MG;
- Amaral Coutinho, Y;
- Ambler, A;
- Ambroz, L;
- Amelung, C;
- Amidei, D;
- Amor Dos Santos, SP;
- Amoroso, S;
- Amrouche, CS;
- Ananiev, V;
- Anastopoulos, C;
- Andari, N;
- Andeen, T;
- Anders, JK;
- Andrean, SY;
- Andreazza, A;
- Angelidakis, S;
- Angerami, A;
- Anisenkov, AV;
- Annovi, A;
- Antel, C;
- Anthony, MT;
- Antipov, E;
- Antonelli, M;
- Antrim, DJA;
- Anulli, F;
- Aoki, M;
- Aparisi Pozo, JA;
- Aparo, MA;
- Aperio Bella, L;
- Aranzabal, N;
- Araujo Ferraz, V;
- Arcangeletti, C;
- Arce, ATH
- et al.
Published Web Location
https://doi.org/10.1103/PhysRevD.105.012006Abstract
This paper presents a search for decays of the Higgs boson with a mass of 125 GeV into a pair of new pseudoscalar particles, H→aa, where one a-boson decays into a b-quark pair and the other into a muon pair. The search uses 139 fb-1 of proton-proton collision data at a center-of-mass energy of s=13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. A narrow dimuon resonance is searched for in the invariant mass spectrum between 16 GeV and 62 GeV. The largest excess of events above the Standard Model backgrounds is observed at a dimuon invariant mass of 52 GeV and corresponds to a local (global) significance of 3.3σ (1.7σ). Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to the bbμμ final state, B(H→aa→bbμμ), and are in the range 0.2-4.0×10-4, depending on the signal mass hypothesis.
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