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 $S=0.03\pm 0.03$, $T=0.06\pm 0.02$ and $U=0.16\pm 0.03$ (or $S=0.14\pm 0.03$, $T=0.24\pm 0.02$ 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 a global fit to study the influence of two different cases of simple extensions by a hyper-charge $Y=1$ triplet scalar $\Delta$ (corresponding to the type-II seesaw model) and a $Y=0$ real triplet scalar $\Sigma$ 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.

19 pages, 4 figures. The results has changed

References in corpus (19)

• Minimal Dark Matter
• Cosmology and Astrophysics of Minimal Dark Matter
• Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Triplet Scalars and Dark Matter at the LHC
• $\text{HEPfit}$: a Code for the Combination of Indirect and Direct Constraints on High Energy Physics Models
• Precision observables in SU(2) x U(1) models with an additional Higgs triplet
• Search for doubly charged scalar bosons decaying into same-sign $W$ boson pairs with the ATLAS detector
• Bounds on the mass of doubly-charged Higgs bosons in the same-sign diboson decay scenario
• Consistency of the triplet seesaw model revisited
• Making the small oblique parameters large
• (Non)decoupling of the Higgs triplet effects
• Maxi-sizing the trilinear Higgs self-coupling: how large could it be?
• Type-II Seesaw Triplet Scalar Effects on Neutrino Trident Scattering
• Exploring the Hyperchargeless Higgs Triplet Model up to the Planck Scale
• Low-Energy Effective Theory, Unitarity, and Non-Decoupling Behavior in a Model with Heavy Higgs-Triplet Fields
• Renormalization of the Higgs sector in the triplet model
• Probing the Type-II Seesaw Mechanism through the Production of Higgs Bosons at a Lepton Collider
• Compatibility of muon $g-2$, $W$ mass anomaly in type-X 2HDM
• CP-violating Dark Photon Interaction

Cited by in corpus (16)

• $SU(2{)}_L$ triplet scalar as the origin of the 95 GeV excess?
• Revealing the origin of neutrino masses through the Type II Seesaw mechanism at high-energy muon colliders
• The oblique parameters in the 2HDM with Vector-Like Quarks: Confronting $M_W$ CDF-II Anomaly
• Testing the Scalar Triplet Solution to CDF's Fat $W$ Problem at the LHC
• Light scalars within the $\mathcal{C}\mathcal{P}$-conserving Aligned-two-Higgs-doublet model
• Minimal model for the $W$-boson mass, $(g-2{)}_{\mu }$, $h\to {\mu }^{+}{\mu }^{-}$ and quark-mixing-matrix unitarity
• Custodial Symmetry Breaking and Higgs Signatures at the LHC
• Anatomy of the Real Higgs Triplet Model
• Type-II Majoron Dark Matter
• Resurrecting the LHC discovery potential in the extended Type-II Seesaw Model
• Hadron Collider Signatures of Lepton Number Violation in the Type II Seesaw Model
• Precision Higgs Boson Probe of Type-II Seesaw Models
• Oblique corrections when $m_W\ne m_Z\cos {\theta }_W$ at tree level
• Correlating neutrino magnetic moment and scalar triplet dark matter to enlighten XENONnT bounds in a Type-II model
• Phenomenological study of a gauged $L_{\mu }-L_{\tau }$ model with a scalar leptoquark
• Two dark matter candidates in a doublet-triplet Higgs model