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Title: Uncovering the high-scale Higgs singlet model

Journal Article · · Physical Review D

The scalar singlet model extends the Standard Model with the addition of a new gauge singlet scalar. We re-examine the limits on the new scalar from oblique parameter fits and from a global fit to precision electroweak observables and present analytic expressions for our results. When the new scalar is much heavier than the weak scale, we map the model onto the dimension-six Standard Model effective field theory (SMEFT) and review the allowed parameter space from unitarity considerations and from the requirement that the electroweak minimum be stable. A global fit to precision electroweak data, along with LHC observables is used to constrain the parameters of the high scale singlet model and we determine the numerical effects of performing the matching at both tree level and 1-loop.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); European Union (EU)
Grant/Contract Number:
SC0012704; SC0013607; G-2019-12504
OSTI ID:
1778473
Alternate ID(s):
OSTI ID: 1787811
Report Number(s):
BNL-221624-2021-JAAM; PRVDAQ; 075016
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 103 Journal Issue: 7; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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