Probing the decay A0 → h0Z(∗) in Two-Higgs-DoubletModels in the inverted hierarchy scenarioat the Large Hadron Collider
Probing the decay A0 → h0Z(∗) in Two-Higgs-DoubletModels in the inverted hierarchy scenarioat the Large Hadron Collider
Searches are being carried out at the Large Hadron Collider (LHC) for the decay of the CP-odd scalar (A0) in Two-Higgs-Doublet Models (2HDMs) with Natural Flavour Conservation (NFC) in the channel A0 → h0Z, where h0is either the discovered 125 GeV Higgs boson or is an undiscovered CP-even scalar with a mass below 125 GeV. The latter possibility is called the ”inverted hierarchy scenario” (IH) and would provide the opportunity of simultaneous discovery of two scalars. In both searches the selection cuts are optimised for the case of an on-shell Z boson. For the case of the Z boson being off-shell (denoted by Z∗, for which mA0 − mh0 < mZ) no limits are seton the relevant 2HDM parameters from this process. It is known that the decay A0 → h0Z∗can have a large branching ratio (BR) in 2HDMs (especially in the Type I structure). In the context of the IH scenario and developing our previous work, we calculate the signal cross sectionσ(gg → A0) × BR(A0 → h0Z(∗)) × BR(h0 → bb, τ τ ) in the four types of 2HDMs with NFC. We also suggest some selection cuts that could provide sensitivity to A0 → h0Z∗in the IH scenario.
hep-ph
Akeroyd, A.G.
e5de827d-7119-41c2-9f1e-5ef123afdf98
Alanazi, S.
7c8bdb4d-f7e9-459e-9bc0-c3d00f15495d
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Akeroyd, A.G.
e5de827d-7119-41c2-9f1e-5ef123afdf98
Alanazi, S.
7c8bdb4d-f7e9-459e-9bc0-c3d00f15495d
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
[Unknown type: UNSPECIFIED]
Abstract
Searches are being carried out at the Large Hadron Collider (LHC) for the decay of the CP-odd scalar (A0) in Two-Higgs-Doublet Models (2HDMs) with Natural Flavour Conservation (NFC) in the channel A0 → h0Z, where h0is either the discovered 125 GeV Higgs boson or is an undiscovered CP-even scalar with a mass below 125 GeV. The latter possibility is called the ”inverted hierarchy scenario” (IH) and would provide the opportunity of simultaneous discovery of two scalars. In both searches the selection cuts are optimised for the case of an on-shell Z boson. For the case of the Z boson being off-shell (denoted by Z∗, for which mA0 − mh0 < mZ) no limits are seton the relevant 2HDM parameters from this process. It is known that the decay A0 → h0Z∗can have a large branching ratio (BR) in 2HDMs (especially in the Type I structure). In the context of the IH scenario and developing our previous work, we calculate the signal cross sectionσ(gg → A0) × BR(A0 → h0Z(∗)) × BR(h0 → bb, τ τ ) in the four types of 2HDMs with NFC. We also suggest some selection cuts that could provide sensitivity to A0 → h0Z∗in the IH scenario.
Text
2408.08314v2
- Author's Original
Available under License Other.
More information
Accepted/In Press date: 19 July 2024
Additional Information:
30 pages, 14 figures. arXiv admin note: substantial text overlap with arXiv:2301.00728; v2 references added
Keywords:
hep-ph
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Local EPrints ID: 503741
URI: http://eprints.soton.ac.uk/id/eprint/503741
PURE UUID: 56c0689e-91b7-4722-9146-317c360894a9
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Date deposited: 12 Aug 2025 16:46
Last modified: 13 Aug 2025 02:10
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