A forgotten fermion: the hypercharge -3/2 doublet, its phenomenology and connections to dark matter
arXiv:2301.12120 · doi:10.1007/JHEP04(2023)133
Abstract
A weak-doublet with hypercharge is one of only a handful of fermions which has a renormalisable interaction with Standard Model fields. This should make it worthy of attention, but it has thus far received little consideration in the literature. In this paper, we perform a thorough investigation of the phenomenology which results from the introduction of this field, . After expressing the model in terms of its effective field theory at dimension-6, we compute a range of electroweak and leptonic observables, the most stringent of which probe up to TeV. The simplicity of this scenario makes it very predictive and allows us to correlate the different processes. We then study how this new fermion can connect the SM to various simple but distinct dark sectors. Some of the most minimal cases of -mediated dark matter (DM) involve frozen-in keV-scale scalar DM, which may produce x-ray lines, and frozen-out TeV-scale fermionic DM.
arXiv comment29 pages, 5 figures
References in corpus (41)
- Dimension-Six Terms in the Standard Model Lagrangian
- The anomalous magnetic moment of the muon in the Standard Model
- Freeze-In Production of FIMP Dark Matter
- Precision Electroweak Measurements on the Z Resonance
- Minimal Dark Matter
- The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
- Measurement of the fine-structure constant as a test of the Standard Model
- Renormalization Group Evolution of the Standard Model Dimension Six Operators III: Gauge Coupling Dependence and Phenomenology
- Leading hadronic contribution to the muon magnetic moment from lattice QCD
- Renormalization Group Evolution of the Standard Model Dimension Six Operators II: Yukawa Dependence
- Renormalization Group Evolution of the Standard Model Dimension Six Operators I: Formalism and lambda Dependence
- Package-X: A Mathematica package for the analytic calculation of one-loop integrals
- Search for Lepton Flavor Violating Tau Decays into Three Leptons with 719 Million Produced Tau+Tau- Pairs
- Detailed calculation of lepton flavor violating muon-electron conversion rate for various nuclei
- Effective description of general extensions of the Standard Model: the complete tree-level dictionary
- Constraining Light Dark Matter with Diffuse X-Ray and Gamma-Ray Observations
- Effects of new leptons in Electroweak Precision Data
- Compilation of low-energy constraints on 4-fermion operators in the SMEFT
- Model-independent precision constraints on dimension-6 operators
- Low-energy effective field theory below the electroweak scale: matching at one loop
- Lepton Flavor Violation in the Standard Model with general Dimension-Six Operators
- Renormalisation-group improved analysis of processes in a systematic effective-field-theory approach
- CKM benchmarks for electron EDM experiments
- On the model discriminating power of mu -> e conversion in nuclei
- Towards consistent Electroweak Precision Data constraints in the SMEFT
- Electroweak limits on physics beyond the Standard Model
- Lyman- constraints on freeze-in and superWIMPs
- Effective field theory interpretation of lepton magnetic and electric dipole moments
- Model independent constraints on four-lepton operators
- Fermionic extensions of the Standard Model in light of the Higgs couplings
- Effective approach to lepton observables: the seesaw case
- Exotic Leptons: Higgs, Flavor and Collider Phenomenology
- Real Scalar Dark Matter: Relativistic Treatment
- Three-loop Neutrino Mass Model with Doubly Charged Particles from Iso-Doublets
- The Bearable Compositeness of Leptons
- Doubly Charged Lepton from an Exotic Doublet at the LHC
- Minimal muon anomalous magnetic moment
- Lepton Flavour Violation in Composite Higgs Models
- Lepton Electric Dipole Moment and Strong CP Violation
- Effective comparison of neutrino-mass models
- A multi-charged particle model with local to explain muon , flavor physics, and possible collider signature