Results 21 to 30 of about 1,453 (168)
Integrating out new fermions at one loop
Journal of High Energy Physics, 2021 We present the fermionic universal one-loop effective action obtained by integrating out heavy vector-like fermions at one loop using functional techniques. Even though previous approaches are able to handle integrating out heavy fermions with non-chiral
Andrei Angelescu, Peisi Huang
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On a Standard Model Extension with Vector-like Fermions and Abelian Symmetry [PDF]
Communications in Physics, 2020 We investigate an extension of the standard model with vector-like fermions and an extra Abelian gauge symmetry. The particle mass spectrum is calculated explicitly. The Lagrangian terms for all the gauge interactions of leptons and quarks in the model are derived.
Hieu Minh Tran +2 more
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Pseudoscalar portal dark matter and new signatures of vector-like fermions [PDF]
Journal of High Energy Physics, 2016 Fermionic dark matter interacting with the Standard Model sector through a pseudoscalar portal could evade the direct detection constraints while preserving a WIMP miracle. We study the LHC constraints on the pseudoscalar production in simplified models with the pseudoscalar either dominantly coupled to b quarks or tau leptons and explore their ...
Fan, JiJi +2 more
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Partial compositeness under precision scrutiny
Journal of High Energy Physics, 2022 We revisit the impact of top partial compositeness on electroweak precision observables in the misaligned vacuum basis. We identify a new source for S in the singlet mixing case, and for S-T in the bi-doublet mixing, stemming from misalignment in the ...
Haiying Cai, Giacomo Cacciapaglia
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Vector-like fermion and standard Higgs production at hadron colliders [PDF]
Nuclear Physics B, 1990 Vector-like fermions are characterized by large neutral current decay rates, in particular into Higgs bosons. If they exist, their clear signals at hadron colliders open a window to Higgs detection, especially to the intermediate Higgs mass region. We discuss in some detail rates and signatures for simple cases.
del Aguila, F. +3 more
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W boson mass anomaly and grand unification
Physics Letters B, 2022 It is known that the recently reported shift of the W boson mass can be easily explained by an SU(2)L triplet Higgs boson with a zero hypercharge if it obtains a vacuum expectation value (VEV) of O(1) GeV.
Jason L. Evans +2 more
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Modelling vector-like quarks in partial compositeness framework
Journal of High Energy Physics, 2022 Composite Higgs models, together with partial compositeness, predict the existence of new scalars and vector-like quarks (partners) at and above the TeV scale.
Avik Banerjee +2 more
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On the implications of positive W mass shift
Journal of High Energy Physics, 2022 We investigate the phenomenological implications of the recent W mass measurement by the CDF collaboration, which exhibits tension with the standard model (SM) electroweak fit.
Reuven Balkin +5 more
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Dynamic radius jet clustering algorithm
Journal of High Energy Physics, 2023 The study of standard QCD jets produced along with fat jets, which may appear as a result of the decay of a heavy particle, has become an essential part of collider studies.
Biswarup Mukhopadhyaya +2 more
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Vacuum stability in the Standard Model with vectorlike fermions
Physical Review D, 2023 27 pages, 12 ...
Ash Arsenault +2 more
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