Type-I 2HDM under the Higgs and electroweak precision measurements
[4];
- Nankai Univ., Tianjin (China). School of Physics
- Univ. of Pittsburgh, PA (United States). Dept. of Physics and Astronomy
- Univ. of Arizona, Tucson, AZ (United States). Dept. of Physics
- Univ. of South Australia, Adelaide, SA (Australia). Dept. of Physics. ARC Centre of Excellence for Particle Physics at the Terascale
- Carleton Univ., Ottawa, ON (Canada). Ottawa-Carleton Inst. for Physics
We explore the extent to which future precision measurements of the Standard Model (SM) observables at the proposedZ-factories and Higgs factories may have impacts on new physics beyond the Standard Model, as illustrated by studying the Type-I Two-Higgs-doublet model (Type-I 2HDM). We include the contributions from the heavy Higgs bosons at the tree-level and at the one-loop level in a full model-parameter space. While only small tanβregion is strongly constrained at tree level, the large tanβregion gets constrained at loop level due to tanβenhanced tri-Higgs couplings. We perform a multiple variableχ2fit with non-alignment and non-degenerate masses. We find that the allowed parameter ranges could be tightly constrained by the future Higgs precision measurements, especially for small and large values of tanβ. Indirect limits on the masses of heavy Higgs bosons can be obtained, which can be complementary to the direct searches of the heavy Higgs bosons at hadron colliders. We also find that the expected accuracies at theZ-pole and at a Higgs factory are quite complementary in constraining mass splittings of heavy Higgs bosons. The typical results are|cos(β - α)| <0.05, |ΔmΦ| <200 GeV, and tanβ≳ 0.3. The reaches from CEPC, Fcc-ee and ILC are also compared, for both Higgs andZ-pole precision measurements. Comparing to the Type-II 2HDM, the 95% C.L. allowed range of cos(β - α) is larger, especially for large values of tanβ.
- Research Organization:
- Univ. of Wisconsin, Madison, WI (United States); Univ. of Arizona, Tucson, AZ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-95ER40896; SC0009913
- OSTI ID:
- 1800824
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2020, Issue 8; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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journal | January 2023 |
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