Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ + ℓ − t t ¯ and ν ν ¯ b b ¯ final states using 140 fb − 1 of data collected with the ATLAS detector

Aad, G; Abbott, B; Abeling, K; Abicht, NJ; Abidi, SH; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Acharya, BS; Adam Bourdarios, C; Adamczyk, L; Addepalli, SV; Addison, MJ; Adelman, J; Adiguzel, A; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Agarwala, J; Aggarwal, A; Agheorghiesei, C; Ahmad, A; Barr, AJ; Bortoletto, D; Bruckler, TL; Celli, F; Chen, M; Conroy, EI; Cooper-Sarkar, AM; Draguet, MA; Eberwein, GH; Frost, JA; Gallas, EJ; Grundy, JC; Gwenlan, C; Harris, YT; Hays, CP; Huffman, TB; Iizawa, T; Karava, K; Koch, SF; Li, Z; Nagai, K; Nedic, L; Nickerson, RB; Pacey, HA; Rossi, E; Ruggiero, A; Schopf, E; Shipsey, IPJ; Smith, HA; Veliscek, I; Viehhauser, GHA; Wei, Y; Weidberg, AR; Yan, S

Journal article

Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ + ℓ − t t ¯ and ν ν ¯ b b ¯ final states using 140 fb − 1 of data collected with the ATLAS detector

Abstract:: A search for a heavy CP-odd Higgs boson, A, decaying into a Z boson and a heavy CP-even Higgs boson, H, is presented. It uses the full LHC Run 2 dataset of pp collisions at s = 13 TeV collected with the ATLAS detector, corresponding to an integrated luminosity of 140 fb−1. The search for A → ZH is performed in the ℓ+ℓ−tt¯ and νν¯bb¯ final states and surpasses the reach of previous searches in different final states in the region with mH > 350 GeV and mA > 800 GeV. No significant deviation from the Standard Model expectation is found. Upper limits are placed on the production cross-section times the decay branching ratios. Limits with less model dependence are also presented as functions of the reconstructed m(tt¯) and m(bb¯) distributions in the ℓ+ℓ−tt¯ and νν¯bb¯ channels, respectively. In addition, the results are interpreted in the context of two-Higgs-doublet models.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adam Bourdarios, C., Adamczyk, L., Addepalli, S. V., Addison, M. J., Adelman, J., Adiguzel, A., Adye, T., Affolder, A. A., Afik, Y., … Yan, S. (2024). Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ + ℓ − t t ¯ and ν ν ¯ b b ¯ final states using 140 fb − 1 of data collected with the ATLAS detector. Journal of High Energy Physics, 2024(2).

MLA Style

Aad, G., et al. “Search for a CP-Odd Higgs Boson Decaying into a Heavy CP-Even Higgs Boson and a Z Boson in the ℓ + ℓ − t t ¯ and ν ν ¯ b b ¯ Final States Using 140 Fb − 1 of Data Collected with the ATLAS Detector.” Journal of High Energy Physics, vol. 2024, no. 2, Springer, 2024.

Chicago Style

Aad, G, B Abbott, K Abeling, NJ Abicht, SH Abidi, A Aboulhorma, H Abramowicz, et al. 2024. “Search for a CP-Odd Higgs Boson Decaying into a Heavy CP-Even Higgs Boson and a Z Boson in the ℓ + ℓ − t t ¯ and ν ν ¯ b b ¯ Final States Using 140 Fb − 1 of Data Collected with the ATLAS Detector.” Journal of High Energy Physics 2024 (2).
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