Universität zu Köln

Chataignier, Leonardo ORCID: 0000-0001-6691-3695, Prokopec, Tomislav, Schmidt, Michael G. and Swiezewska, Bogumila ORCID: 0000-0003-0169-211X (2018). Systematic analysis of radiative symmetry breaking in models with extended scalar sector. J. High Energy Phys. (8). NEW YORK: SPRINGER. ISSN 1029-8479

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Abstract

Radiative symmetry breaking (RSB) is a theoretically appealing framework for the generation of mass scales through quantum effects. It can be successfully implemented in models with extended scalar and gauge sectors. We provide a systematic analysis of RSB in such models: we review the common approximative methods of studying RSB, emphasising their limits of applicability and discuss the relevance of the relative magnitudes of tree-level and loop contributions as well as the dependence of the results on the renormalisation scale. The general considerations are exemplified within the context of the conformal Standard Model extended with a scalar doublet of a new SU(2)(x) gauge group, the so-called SU(2)cSM. We show that various perturbative methods of studying RSB may yield significantly different results due to renormalisation-scale dependence. Implementing the renormalisation-group (RG) improvement method recently developed in ref. [1], which is well-suited for multi-scale models, we argue that the use of the RG improved effective potential can alleviate this scale dependence providing more reliable results.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Chataignier, Leonardo UNSPECIFIED orcid.org/0000-0001-6691-3695 UNSPECIFIED Prokopec, Tomislav UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Michael G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Swiezewska, Bogumila UNSPECIFIED orcid.org/0000-0003-0169-211X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-176471
DOI:	10.1007/JHEP08(2018)083
Journal or Publication Title:	J. High Energy Phys.
Number:	8
Date:	2018
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1029-8479
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ELECTROWEAK HIGGS; BROKEN SYMMETRIES; GAUGE DEPENDENCE; MASS; BOSON Multiple languages Physics, Particles & Fields Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17647