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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector

ATLAS Collaboration; S. Alderweireldt; J.F. Allen; T.M. Carter; P. J.  Clark; D. Duda; S. M. Farrington; Y. Gao; J.M. Gargan; R.Y. Gonzalez Andana; C. Leonidopoulos; V. J.  Martin; L. Mijović; V.A. Parrish; E.A. Pender; T. Qiu; E.P. Takeva; N. Themistokleous; E.M. Villhauer; B.M. Wynne; Z. Xu; E. Zaid

doi:10.1007/JHEP02(2024)197

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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector

ATLAS Collaboration, S. Alderweireldt, J.F. Allen, T.M. Carter, P. J. Clark, D. Duda, S. M. Farrington, Y. Gao, J.M. Gargan, R.Y. Gonzalez Andana, C. Leonidopoulos, V. J. Martin, L. Mijović, V.A. Parrish, E.A. Pender, T. Qiu, E.P. Takeva, N. Themistokleous, E.M. Villhauer, B.M. WynneZ. Xu, E. Zaid

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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−t¯t and ν ¯νb¯b 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(t¯t) and m(b¯b) distributions in the ℓ+ℓ−t¯t and ν ¯νb¯b channels, respectively.
In addition, the results are interpreted in the context of two-Higgs-doublet models.

Original language	English
Article number	197
Pages (from-to)	1-55
Number of pages	55
Journal	Journal of High Energy Physics
Volume	2024
Issue number	2
DOIs	https://doi.org/10.1007/JHEP02(2024)197
Publication status	Published - 26 Feb 2024

Keywords / Materials (for Non-textual outputs)

Hadron-Hadron Scattering

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10.1007/JHEP02(2024)197Licence: Creative Commons: Attribution (CC-BY)

3 Finished
3 Active

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 31/03/26
Project: Research

Cite this

ATLAS Collaboration, Alderweireldt, S., Allen, J. F., Carter, T. M., Clark, P. J., Duda, D., Farrington, S. M., Gao, Y., Gargan, J. M., Gonzalez Andana, R. Y., Leonidopoulos, C., Martin, V. J., Mijović, L., Parrish, V. A., Pender, E. A., Qiu, T., Takeva, E. P., Themistokleous, N., Villhauer, E. M., ... Zaid, E. (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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector. Journal of High Energy Physics, 2024(2), 1-55. Article 197. https://doi.org/10.1007/JHEP02(2024)197

@article{a5efd5ae7ff945a4a90c20a479b4ac8c,

title = "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 ¯νb¯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 anda heavy CP-even Higgs boson, H, is presented. It uses the full LHC Run 2 dataset of ppcollisions at √s = 13 TeV collected with the ATLAS detector, corresponding to an integratedluminosity of 140 fb−1. The search for A → ZH is performed in the ℓ+ℓ−t¯t and ν ¯νb¯b finalstates and surpasses the reach of previous searches in different final states in the regionwith mH > 350 GeV and mA > 800 GeV. No significant deviation from the Standard Modelexpectation is found. Upper limits are placed on the production cross-section times the decaybranching ratios. Limits with less model dependence are also presented as functions of thereconstructed m(t¯t) and m(b¯b) distributions in the ℓ+ℓ−t¯t and ν ¯νb¯b channels, respectively.In addition, the results are interpreted in the context of two-Higgs-doublet models.",

keywords = "Hadron-Hadron Scattering",

author = "{ATLAS Collaboration} and S. Alderweireldt and J.F. Allen and T.M. Carter and Clark, {P. J.} and D. Duda and Farrington, {S. M.} and Y. Gao and J.M. Gargan and {Gonzalez Andana}, R.Y. and C. Leonidopoulos and Martin, {V. J.} and L. Mijovi{\'c} and V.A. Parrish and E.A. Pender and T. Qiu and E.P. Takeva and N. Themistokleous and E.M. Villhauer and B.M. Wynne and Z. Xu and E. Zaid",

year = "2024",

month = feb,

day = "26",

doi = "10.1007/JHEP02(2024)197",

language = "English",

volume = "2024",

pages = "1--55",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "2",

}

ATLAS Collaboration, Alderweireldt, S, Allen, JF, Carter, TM, Clark, PJ , Duda, D , Farrington, SM , Gao, Y, Gargan, JM, Gonzalez Andana, RY, Leonidopoulos, C , Martin, VJ , Mijović, L, Parrish, VA, Pender, EA, Qiu, T, Takeva, EP, Themistokleous, N, Villhauer, EM, Wynne, BM , Xu, Z & Zaid, E 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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector', Journal of High Energy Physics, vol. 2024, no. 2, 197, pp. 1-55. https://doi.org/10.1007/JHEP02(2024)197

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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector. / ATLAS Collaboration ; Alderweireldt, S.; Allen, J.F. et al.
In: Journal of High Energy Physics, Vol. 2024, No. 2, 197, 26.02.2024, p. 1-55.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - 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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector

AU - ATLAS Collaboration

AU - Alderweireldt, S.

AU - Allen, J.F.

AU - Carter, T.M.

AU - Clark, P. J.

AU - Duda, D.

AU - Farrington, S. M.

AU - Gao, Y.

AU - Gargan, J.M.

AU - Gonzalez Andana, R.Y.

AU - Leonidopoulos, C.

AU - Martin, V. J.

AU - Mijović, L.

AU - Parrish, V.A.

AU - Pender, E.A.

AU - Qiu, T.

AU - Takeva, E.P.

AU - Themistokleous, N.

AU - Villhauer, E.M.

AU - Wynne, B.M.

AU - Xu, Z.

AU - Zaid, E.

PY - 2024/2/26

Y1 - 2024/2/26

N2 - A search for a heavy CP-odd Higgs boson, A, decaying into a Z boson anda heavy CP-even Higgs boson, H, is presented. It uses the full LHC Run 2 dataset of ppcollisions at √s = 13 TeV collected with the ATLAS detector, corresponding to an integratedluminosity of 140 fb−1. The search for A → ZH is performed in the ℓ+ℓ−t¯t and ν ¯νb¯b finalstates and surpasses the reach of previous searches in different final states in the regionwith mH > 350 GeV and mA > 800 GeV. No significant deviation from the Standard Modelexpectation is found. Upper limits are placed on the production cross-section times the decaybranching ratios. Limits with less model dependence are also presented as functions of thereconstructed m(t¯t) and m(b¯b) distributions in the ℓ+ℓ−t¯t and ν ¯νb¯b channels, respectively.In addition, the results are interpreted in the context of two-Higgs-doublet models.

AB - A search for a heavy CP-odd Higgs boson, A, decaying into a Z boson anda heavy CP-even Higgs boson, H, is presented. It uses the full LHC Run 2 dataset of ppcollisions at √s = 13 TeV collected with the ATLAS detector, corresponding to an integratedluminosity of 140 fb−1. The search for A → ZH is performed in the ℓ+ℓ−t¯t and ν ¯νb¯b finalstates and surpasses the reach of previous searches in different final states in the regionwith mH > 350 GeV and mA > 800 GeV. No significant deviation from the Standard Modelexpectation is found. Upper limits are placed on the production cross-section times the decaybranching ratios. Limits with less model dependence are also presented as functions of thereconstructed m(t¯t) and m(b¯b) distributions in the ℓ+ℓ−t¯t and ν ¯νb¯b channels, respectively.In addition, the results are interpreted in the context of two-Higgs-doublet models.

KW - Hadron-Hadron Scattering

U2 - 10.1007/JHEP02(2024)197

DO - 10.1007/JHEP02(2024)197

M3 - Article

SN - 1126-6708

VL - 2024

SP - 1

EP - 55

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 2

M1 - 197

ER -

ATLAS Collaboration, Alderweireldt S, Allen JF, Carter TM, Clark PJ , Duda D 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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector. Journal of High Energy Physics. 2024 Feb 26;2024(2):1-55. 197. doi: 10.1007/JHEP02(2024)197

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 ¯νb¯b final states using 140 fb−1 of data collected with the ATLAS detector

Abstract

Keywords / Materials (for Non-textual outputs)

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Projects

Experimental Particle Physics at the University of Edinburgh

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Cite this