Report/Journal Article

PUBDB-2015-01161

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The Standard Model as a Low-energy Effective Theory: What is Triggering the Higgs Mechanism?

Jegerlehner, F. (Corresponding Author)>Extern*

2014
Inst. of Physics, Jagellonian Univ. Cracow

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Please use a persistent id in citations: doi:10.5506/APhysPolB.45.1167

Report No.: DESY 13-074; HU-EP-13/23; arXiv:1304.7813

Abstract: The discovery of the Higgs by ATLAS and CMS at the LHC not only provided the last missing building block of the electroweak Standard Model, the mass of the Higgs has been found to have a very peculiar value about 125 GeV, which is such that vacuum stability is extending up to the Planck scale. This may have much deeper drawback than anticipated so far. The impact on the running of the SM gauge, Yukawa and Higgs couplings up to the Planck scale has been discussed in several articles recently. Here we consider the impact on the running masses and we discuss the role of quadratic divergences within the Standard Model. The change of sign of the coefficient of the quadratically divergent terms showing up at about mu_0 ~ 7 x 10^16 GeV may be understood as a first order phase transition restoring the symmetric phase, while its large negative values at lower scales triggers the Higgs mechanism, running parameters evolve in such a way that the symmetry is restored two orders of magnitude before the Planck scale. Thus, the electroweak phase transition takes place at the scale mu_0 and not at the electroweak scale v ~ 250 GeV. The SM Higgs system and its phase transition could play a key role for the inflation of the early universe. Also baryogenesis has to be reconsidered under the aspect that perturbative arguments surprisingly work up to the Planck scale.

Note: OA

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Contributing Institute(s):

1. Theorie (ZEU-THEO)

Research Program(s):

1. 514 - Theoretical Particle Physics (POF2-514) (POF2-514)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2014

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Internal Report Jegerlehner, F. (Corresponding author)Extern*
The Standard model as a low-energy effective theory: what is triggering the Higgs mechanism?
Red Report 29 p. (2013)2013     Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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