Vectorlike fermions and Higgs effective field theory revisited

Chen, Chien-Yi; Dawson, S.; Furlan, Elisabetta

doi:10.1103/PhysRevD.96.015006

Title: Vectorlike fermions and Higgs effective field theory revisited

Journal Article · Mon Jul 10 00:00:00 EDT 2017 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.96.015006· OSTI ID:1377052

Chen, Chien-Yi ^[1]; Dawson, S. ^[2]; Furlan, Elisabetta ^[3]

Univ. of Victoria, BC (Canada). Dept. of Physics and Astronomy; Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
ETH Zurich (Switzerland). Inst. for Theoretical Physics

Heavy vectorlike quarks (VLQs) appear in many models of beyond the Standard Model physics. Direct experimental searches require these new quarks to be heavy, ≳ 800 – 1000 GeV . Here, we perform a global fit of the parameters of simple VLQ models in minimal representations of S U ( 2 )_L to precision data and Higgs rates. One interesting connection between anomalous Z b$$\bar{b}$$ interactions and Higgs physics in VLQ models is discussed. Finally, we present our analysis in an effective field theory (EFT) framework and show that the parameters of VLQ models are already highly constrained. Exact and approximate analytical formulas for the S and T parameters in the VLQ models we consider are available in the Supplemental Material as Mathematica files.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC00112704; 200021-165772; 200021-160811; SC0012704

OSTI ID:: 1377052

Alternate ID(s):: OSTI ID: 1369098

Report Number(s):: BNL-114196-2017-JA; PRVDAQ; KA2401012

Journal Information:: Physical Review D, Vol. 96, Issue 1; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 42 works

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
fermions
higgs
EFT
HET
GeV
VLQ
vector
quarks

Title: Vectorlike fermions and Higgs effective field theory revisited

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