Results 1 to 10 of about 1,411 (170)
Unification with vector-like fermions and signals at LHC [PDF]
Journal of High Energy Physics, 2018 We look for minimal extensions of Standard Model with vector like fermions leading to precision unification of gauge couplings. Constraints from proton decay, Higgs stability and perturbativity are considered.
Biplob Bhattacherjee +3 more
doaj +5 more sources
Relic challenges for vector-like fermions as connectors to a dark sector
Journal of High Energy Physics, 2023 New dark sectors consisting of exotic fields that couple only very feebly to the Standard Model (SM) have strong theoretical motivation and may be relevant to explaining the abundance of dark matter (DM).
Alexandre Carvunis +2 more
doaj +6 more sources
Collider signatures of vector-like fermions from a flavor symmetric model [PDF]
Journal of High Energy Physics, 2022 We propose a model with two Higgs doublets and several SU(2) scalar singlets with a global non-Abelian flavor symmetry Q 6 × Z 2 $$ {\mathcal{Q}}_6\times {\mathcal{Z}}_2 $$ .
Cesar Bonilla +5 more
doaj +5 more sources
Road map through the desert: unification with vector-like fermions [PDF]
Journal of High Energy Physics, 2019 In light of null results from New Physics searches at the LHC, we look at unification of the gauge couplings as a model-building principle. As a first step, we consider extensions of the Standard Model with vector-like fermions.
Kamila Kowalska, Dinesh Kumar
doaj +4 more sources
New vector-like fermions and flavor physics [PDF]
Journal of High Energy Physics, 2015 We study renormalizable extensions of the standard model that contain vector-like fermions in a (single) complex representation of the standard model gauge group. There are 11 models where the vector-like fermions Yukawa couple to the standard model fermions via the Higgs field. These models do not introduce additional fine- tunings.
Koji Ishiwata +2 more
exaly +5 more sources
ΔF=2 effective Lagrangian in theories with vector-like fermions [PDF]
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1998 18 pages, Latex, 9 figures. Typos and misprints were corrected and some references added. To appear in Phys.
G Barenboim, F J Botella
exaly +4 more sources
Baryogenesis and dark matter with vector-like fermions [PDF]
Journal of High Energy Physics, 2013 We show that vector-like fermions can act as the dark matter candidate in the universe whilst also playing a crucial role in electroweak baryogenesis through contributing to the barrier in the one-loop thermal scalar potential. In order for the new fermions to give rise to a strong first order phase transition, we show that one requires rather large ...
M Fairbairn
exaly +4 more sources
Scalar Resonance at 750 GeV as Composite of Heavy Vector-Like Fermions [PDF]
Communications in Theoretical Physics, 2016 12 pages, no figure, references updated, version for ...
Liao, Wei, Zheng, Han-qing
exaly +3 more sources
On the phase structure of vector-like gauge theories with massless fermions
Nuclear Physics B, 1982 Abstract We present a systematic expansion for studying an infrared-stable fixed point of gauge theories with massless fermions. These results are combined with information from strong coupling and large-NF expansions to sketch the phase diagrams for lattice gauge theories with massless fermions.
T Banks
exaly +2 more sources
Constraining models with vector-like fermions from FCNC in K and B physics [PDF]
Nuclear Physics B, 2001 In this work, we update the constraints on tree level FCNC couplings in the framework of a theory with n isosinglet vector-like down quarks. In this context, we emphasize the sensitivity of the B -> J/psi K_S CP asymmetry to the presence of new vector-like down quarks. This CP asymmetry, together with the rare decays B -> X_{s,d} l bar{l} and K -&
OSCAR Vives, G Barenboim, F J Botella
exaly +4 more sources