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Title: Reducing the quadratic divergence in the Higgs boson mass squared without top partners

Abstract

We examine a model with multiple scalar fields to see whether it is possible to reduce the fine-tuning of the Standard Model Higgs mass without introducing low scale top partners. Our approach may be regarded as a generalization of the condition proposed by Veltman, who attempted to predict the Higgs mass using the criterion that the various low energy contributions to the quadratic divergence of the Higgs mass cancel. Although the Veltman condition predicts the wrong Higgs mass in the Standard Model, it can still be adapted to extended Higgs sectors. Furthermore, theories with additional Higgs bosons can lead to suppressed Yukawa couplings of the top quark to the 125 GeV Higgs, making the associated one-loop divergence smaller. Here, we review possible extensions of the Standard Model where the Veltman condition could be realized, and study in detail one minimal model with two extra scalar fields. For this model and for a cutoff of 5 TeV, we show that the overall fine-tuning can be considerably lowered without introducing low-scale Landau poles, albeit the Higgs sector will contain fairly large couplings at the cutoff. Models where the top Yukawa coupling is reduced, in particular, will be within the reach of themore » upcoming LHC searches.« less

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States); Nikhef, Amsterdam (Netherlands)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Netherlands Organisation for Scientific Research (NWO)
OSTI Identifier:
1465228
Alternate Identifier(s):
OSTI ID: 1498662
Grant/Contract Number:  
[SC0011637]
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
[Journal Name: Physical Review D Journal Volume: 98 Journal Issue: 3]; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; electroweak radiative corrections; extensions of Higgs sector; hierarchy problem

Citation Formats

El Hedri, Sonia, Nelson, Ann E., and Walker, Devin G. E. Reducing the quadratic divergence in the Higgs boson mass squared without top partners. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.035029.
El Hedri, Sonia, Nelson, Ann E., & Walker, Devin G. E. Reducing the quadratic divergence in the Higgs boson mass squared without top partners. United States. doi:10.1103/PhysRevD.98.035029.
El Hedri, Sonia, Nelson, Ann E., and Walker, Devin G. E. Mon . "Reducing the quadratic divergence in the Higgs boson mass squared without top partners". United States. doi:10.1103/PhysRevD.98.035029.
@article{osti_1465228,
title = {Reducing the quadratic divergence in the Higgs boson mass squared without top partners},
author = {El Hedri, Sonia and Nelson, Ann E. and Walker, Devin G. E.},
abstractNote = {We examine a model with multiple scalar fields to see whether it is possible to reduce the fine-tuning of the Standard Model Higgs mass without introducing low scale top partners. Our approach may be regarded as a generalization of the condition proposed by Veltman, who attempted to predict the Higgs mass using the criterion that the various low energy contributions to the quadratic divergence of the Higgs mass cancel. Although the Veltman condition predicts the wrong Higgs mass in the Standard Model, it can still be adapted to extended Higgs sectors. Furthermore, theories with additional Higgs bosons can lead to suppressed Yukawa couplings of the top quark to the 125 GeV Higgs, making the associated one-loop divergence smaller. Here, we review possible extensions of the Standard Model where the Veltman condition could be realized, and study in detail one minimal model with two extra scalar fields. For this model and for a cutoff of 5 TeV, we show that the overall fine-tuning can be considerably lowered without introducing low-scale Landau poles, albeit the Higgs sector will contain fairly large couplings at the cutoff. Models where the top Yukawa coupling is reduced, in particular, will be within the reach of the upcoming LHC searches.},
doi = {10.1103/PhysRevD.98.035029},
journal = {Physical Review D},
number = [3],
volume = [98],
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
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DOI: 10.1103/PhysRevD.98.035029

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