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High Energy Physics - Phenomenology

arXiv:1503.02819 (hep-ph)
[Submitted on 10 Mar 2015 (v1), last revised 7 May 2015 (this version, v2)]

Title:A Scale-invariant Higgs Sector and Structure of the Vacuum

Authors:Kazuhiro Endo, Yukinari Sumino
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Abstract:In view of the current status of measured Higgs boson properties, we consider a question whether only the Higgs self-interactions can deviate significantly from the Standard-Model (SM) predictions. This may be possible if the Higgs effective potential is irregular at the origin. As an example we investigate an extended Higgs sector with singlet scalar(s) and classical scale invariance. We develop a perturbative formulation necessary to analyze this model in detail. The behavior of a phenomenologically valid potential in the perturbative regime is studied around the electroweak scale. We reproduce known results: The Higgs self-interactions are substantially stronger than the SM predictions, while the Higgs interactions with other SM particles are barely changed. We further predict that the interactions of singlet scalar(s), which is a few to several times heavier than the Higgs boson, tend to be fairly strong. If probed, these features will provide vivid clues to the structure of the vacuum. We also examine Veltman's condition for the Higgs boson mass.
Comments: 26 pages, 14 figures, minor modification, version to appear in JHEP
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: TU-975
Cite as: arXiv:1503.02819 [hep-ph]
  (or arXiv:1503.02819v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.02819
Journal reference: JHEP 1505, 030 (2015)
Related DOI: https://doi.org/10.1007/JHEP05%282015%29030

Submission history

From: Kazuhiro Endo [view email]
[v1] Tue, 10 Mar 2015 09:07:13 UTC (1,040 KB)
[v2] Thu, 7 May 2015 06:07:12 UTC (1,040 KB)
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