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Title: Constraints from triple gauge couplings on vectorlike leptons

Journal Article · · Physical Review D

Here, we study the contributions of colorless vectorlike fermions to the triple gauge couplings W+W-γ and W+W-Z0. We consider models in which their coupling to the Standard Model Higgs boson is allowed or forbidden by quantum numbers. We assess the sensitivity of the future accelerators FCC-ee, ILC, and CLIC to the parameters of these models, assuming they will be able to constrain the anomalous triple gauge couplings with precision δκV~O(10-4), V = γ,Z0. We show that the combination of measurements at different center-of-mass energies helps to improve the sensitivity to the contribution of vectorlike fermions, in particular when they couple to the Higgs. In fact, the measurements at the FCC-ee and, especially, the ILC and the CLIC, may turn the triple gauge couplings into a new set of precision parameters able to constrain the models better than the oblique parameters or the H → γγ decay, even assuming the considerable improvement of the latter measurements achievable at the new machines.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1452788
Alternate ID(s):
OSTI ID: 1377662
Report Number(s):
FERMILAB-PUB-17-190-T; arXiv:1706.03073; PRVDAQ; 1604283; TRN: US1900983
Journal Information:
Physical Review D, Vol. 96, Issue 3; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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Spontaneous twin symmetry breaking journal December 2019
Phenomenology of doublet-triplet fermionic dark matter in nonstandard cosmology and multicomponent dark sectors journal November 2018

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