Electroweak precision tests for triplet scalars

Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Yu Cheng [verfasserIn] Xiao-Gang He [verfasserIn] Fei Huang [verfasserIn] Jin Sun [verfasserIn] Zhi-Peng Xing [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Übergeordnetes Werk:	In: Nuclear Physics B - Elsevier, 2015, 989(2023), Seite 116118-
Übergeordnetes Werk:	volume:989 ; year:2023 ; pages:116118-

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1016/j.nuclphysb.2023.116118

Katalog-ID:	DOAJ088363937

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allfields	10.1016/j.nuclphysb.2023.116118 doi (DE-627)DOAJ088363937 (DE-599)DOAJ7f9a06524eee4c0cbea9185afcd9f82c DE-627 ger DE-627 rakwb eng QC770-798 Yu Cheng verfasserin aut Electroweak precision tests for triplet scalars 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors. Nuclear and particle physics. Atomic energy. Radioactivity Xiao-Gang He verfasserin aut Fei Huang verfasserin aut Jin Sun verfasserin aut Zhi-Peng Xing verfasserin aut In Nuclear Physics B Elsevier, 2015 989(2023), Seite 116118- (DE-627)266014984 (DE-600)1466567-0 18731562 nnns volume:989 year:2023 pages:116118- https://doi.org/10.1016/j.nuclphysb.2023.116118 kostenfrei https://doaj.org/article/7f9a06524eee4c0cbea9185afcd9f82c kostenfrei http://www.sciencedirect.com/science/article/pii/S0550321323000470 kostenfrei https://doaj.org/toc/0550-3213 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2111 GBV_ILN_2336 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 989 2023 116118-
spelling	10.1016/j.nuclphysb.2023.116118 doi (DE-627)DOAJ088363937 (DE-599)DOAJ7f9a06524eee4c0cbea9185afcd9f82c DE-627 ger DE-627 rakwb eng QC770-798 Yu Cheng verfasserin aut Electroweak precision tests for triplet scalars 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors. Nuclear and particle physics. Atomic energy. Radioactivity Xiao-Gang He verfasserin aut Fei Huang verfasserin aut Jin Sun verfasserin aut Zhi-Peng Xing verfasserin aut In Nuclear Physics B Elsevier, 2015 989(2023), Seite 116118- (DE-627)266014984 (DE-600)1466567-0 18731562 nnns volume:989 year:2023 pages:116118- https://doi.org/10.1016/j.nuclphysb.2023.116118 kostenfrei https://doaj.org/article/7f9a06524eee4c0cbea9185afcd9f82c kostenfrei http://www.sciencedirect.com/science/article/pii/S0550321323000470 kostenfrei https://doaj.org/toc/0550-3213 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2111 GBV_ILN_2336 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 989 2023 116118-
allfields_unstemmed	10.1016/j.nuclphysb.2023.116118 doi (DE-627)DOAJ088363937 (DE-599)DOAJ7f9a06524eee4c0cbea9185afcd9f82c DE-627 ger DE-627 rakwb eng QC770-798 Yu Cheng verfasserin aut Electroweak precision tests for triplet scalars 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors. Nuclear and particle physics. Atomic energy. Radioactivity Xiao-Gang He verfasserin aut Fei Huang verfasserin aut Jin Sun verfasserin aut Zhi-Peng Xing verfasserin aut In Nuclear Physics B Elsevier, 2015 989(2023), Seite 116118- (DE-627)266014984 (DE-600)1466567-0 18731562 nnns volume:989 year:2023 pages:116118- https://doi.org/10.1016/j.nuclphysb.2023.116118 kostenfrei https://doaj.org/article/7f9a06524eee4c0cbea9185afcd9f82c kostenfrei http://www.sciencedirect.com/science/article/pii/S0550321323000470 kostenfrei https://doaj.org/toc/0550-3213 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2111 GBV_ILN_2336 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 989 2023 116118-
allfieldsGer	10.1016/j.nuclphysb.2023.116118 doi (DE-627)DOAJ088363937 (DE-599)DOAJ7f9a06524eee4c0cbea9185afcd9f82c DE-627 ger DE-627 rakwb eng QC770-798 Yu Cheng verfasserin aut Electroweak precision tests for triplet scalars 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors. Nuclear and particle physics. Atomic energy. Radioactivity Xiao-Gang He verfasserin aut Fei Huang verfasserin aut Jin Sun verfasserin aut Zhi-Peng Xing verfasserin aut In Nuclear Physics B Elsevier, 2015 989(2023), Seite 116118- (DE-627)266014984 (DE-600)1466567-0 18731562 nnns volume:989 year:2023 pages:116118- https://doi.org/10.1016/j.nuclphysb.2023.116118 kostenfrei https://doaj.org/article/7f9a06524eee4c0cbea9185afcd9f82c kostenfrei http://www.sciencedirect.com/science/article/pii/S0550321323000470 kostenfrei https://doaj.org/toc/0550-3213 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2111 GBV_ILN_2336 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 989 2023 116118-
allfieldsSound	10.1016/j.nuclphysb.2023.116118 doi (DE-627)DOAJ088363937 (DE-599)DOAJ7f9a06524eee4c0cbea9185afcd9f82c DE-627 ger DE-627 rakwb eng QC770-798 Yu Cheng verfasserin aut Electroweak precision tests for triplet scalars 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors. Nuclear and particle physics. Atomic energy. Radioactivity Xiao-Gang He verfasserin aut Fei Huang verfasserin aut Jin Sun verfasserin aut Zhi-Peng Xing verfasserin aut In Nuclear Physics B Elsevier, 2015 989(2023), Seite 116118- (DE-627)266014984 (DE-600)1466567-0 18731562 nnns volume:989 year:2023 pages:116118- https://doi.org/10.1016/j.nuclphysb.2023.116118 kostenfrei https://doaj.org/article/7f9a06524eee4c0cbea9185afcd9f82c kostenfrei http://www.sciencedirect.com/science/article/pii/S0550321323000470 kostenfrei https://doaj.org/toc/0550-3213 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2004 GBV_ILN_2014 GBV_ILN_2111 GBV_ILN_2336 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 989 2023 116118-
language	English
source	In Nuclear Physics B 989(2023), Seite 116118- volume:989 year:2023 pages:116118-
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topic_title	QC770-798 Electroweak precision tests for triplet scalars
topic	misc QC770-798 misc Nuclear and particle physics. Atomic energy. Radioactivity
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title	Electroweak precision tests for triplet scalars
ctrlnum	(DE-627)DOAJ088363937 (DE-599)DOAJ7f9a06524eee4c0cbea9185afcd9f82c
title_full	Electroweak precision tests for triplet scalars
author_sort	Yu Cheng
journal	Nuclear Physics B
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container_start_page	116118
author_browse	Yu Cheng Xiao-Gang He Fei Huang Jin Sun Zhi-Peng Xing
container_volume	989
class	QC770-798
format_se	Elektronische Aufsätze
author-letter	Yu Cheng
doi_str_mv	10.1016/j.nuclphysb.2023.116118
author2-role	verfasserin
title_sort	electroweak precision tests for triplet scalars
callnumber	QC770-798
title_auth	Electroweak precision tests for triplet scalars
abstract	Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors.
abstractGer	Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors.
abstract_unstemmed	Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S=0.03±0.03, T=0.06±0.02 and U=0.16±0.03 (or S=0.14±0.03, T=0.24±0.02 with U=0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out global fits to study the influence of two different cases of simple extensions by a hyper-charge Y=1 triplet scalar Δ (corresponding to the type-II seesaw model) and a Y=0 real triplet scalar Σ, on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y=1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the doubly-charged mass mH++, potential parameter λ4 and triplet vev vΔ. Our global fit obtains mH++=103.02±9.84 GeV, λ4=1.16±0.07 and vΔ=0.09±0.09 GeV. This parameter correspondingly results in mass difference Δm=mH+−mH++=64.78±2.39 GeV. We find that the doubly-charged mass mH++ satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data, triple Higgs self-coupling and lepton colliders analysis. For Y=0 case, there are four new scalars in the model. The tree and loop effects on the oblique parameters can be parameterized by the singly charged mass mH+, the mass difference Δm=mH+−mH0 and triplet vev vΣ with the fit values mH+=199.45±39.73 GeV, Δm=−2.32±1.99 GeV and vΣ=3.86±0.27 GeV, respectively. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can be satisfied within 1σ errors.
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title_short	Electroweak precision tests for triplet scalars
url	https://doi.org/10.1016/j.nuclphysb.2023.116118 https://doaj.org/article/7f9a06524eee4c0cbea9185afcd9f82c http://www.sciencedirect.com/science/article/pii/S0550321323000470 https://doaj.org/toc/0550-3213
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