Results 91 to 100 of about 1,339 (163)
Theoretical constraints on models with vectorlike fermions
Physical Review DWe provide a set of theoretical constraints on models in which the Standard Model field content is extended by vectorlike fermions and in some cases also by a real scalar singlet. Our approach is based on the study of electroweak vacuum stability, perturbativity of model couplings, and gauge couplings unification with the use of renormalization group ...
Amit Adhikary +3 more
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Flavor invariants for the SM with one singlet vector-like quark
Journal of High Energy PhysicsWe study the flavor invariants of the SM augmented by one singlet vector-like quark. Aided by the Hilbert series, we construct all the basic invariants with which any flavor invariant can be written as a polynomial.
E. L. F. de Lima, C. C. Nishi
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Anomaly free Froggatt-Nielsen models of flavor
Journal of High Energy Physics, 2019 We introduce two anomaly free versions of Froggatt-Nielsen (FN) models, based on either G FN = U(1)3 or G FN = U(1) horizontal symmetries, that generate the SM quark and lepton flavor structures.
Aleks Smolkovič +2 more
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Revisiting the inert scalar dark matter with vector-like quarks
Journal of High Energy PhysicsThe inert doublet model (IDM), a minimal extension of the Standard Model (SM), provides a scalar dark matter (DM) candidate that belongs to the additional Higgs doublet.
Prasanta Kumar Das +3 more
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Electroweak baryogenesis in a scalar-assisted vectorlike fermion model
Physical Review D, 2016 We extend the standard model to a scalar-assisted vector-like fermion model to realize electroweak baryogenesis. The extended Cabbibo-Kobayashi-Maskawa matrix, due to the mixing among the vector-like quark and the standard model quarks, provides additional sources of the CP violation.
Xiao, Ming-Lei, Yu, Jiang-Hao
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The automation of SMEFT-assisted constraints on UV-complete models
Journal of High Energy PhysicsThe ongoing Effective Field Theory (EFT) program at the LHC and elsewhere is motivated by streamlining the connection between experimental data and UV-complete scenarios of heavy new physics beyond the Standard Model (BSM). This connection is provided by
Jaco ter Hoeve +4 more
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Interpreting the 750 GeV diphoton excess within topflavor seesaw model
Nuclear Physics B, 2016 We propose that the extension of the Standard Model by typical vector-like SU(2)L doublet fermions and non-singlet scalar field can account for the observed 750 GeV diphoton excess in experimentally allowed parameter space.
Junjie Cao +4 more
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Unveiling desert region in inert doublet model assisted by Peccei-Quinn symmetry
Journal of High Energy PhysicsThe Inert Higgs Doublet model (IDM), assisted by Peccei-Quinn (PQ) symmetry, offers a simple but natural framework of a dark sector that accommodates Weakly Interacting Massive Particle (WIMP) and axion as dark matter components.
Anupam Ghosh, Partha Konar
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Search for vector-like quarks in a fermionic dark matter model with pseudoscalar: A resonance case
Modern Physics Letters A, 2018 We propose a minimal model of a fermionic dark matter with a pseudoscalar mediator and N generation of vector-like quarks. We calculate the relic density and obtain a new constraint on the generation of the vector-like quarks. From the viewpoint of phenomenology, we probe the proposed model via direct and indirect approaches.
Seyed Yaser Ayazi +2 more
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