Results 81 to 90 of about 1,453 (168)
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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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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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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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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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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Phenomenology of Vector-like Fermions in Physics Beyond the Standard Model
, 2017 PhD thesis, based on arXiv:1408 ...
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Anomalous U(1) extension of the Standard Model
Journal of High Energy PhysicsWe present a set of example models in which the Standard Model (SM) symmetry group is extended by a new abelian symmetry. This additional symmetry appears anomalous in the effective low-energy theory; however, the anomalies cancel out when massive chiral
Pascal Anastasopoulos +3 more
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Revisiting the minimal Nelson-Barr model
Journal of High Energy PhysicsWe revisit the minimal Nelson-Barr model for solving the strong CP problem through the idea of spontaneous CP breaking. The minimal model suffers from the quality problem, which means that the strong CP angle is generated by higher-dimensional operators ...
Kai Murai, Kazunori Nakayama
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