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Renormalization group running of the neutrino mass operator in extra dimensions
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Theoretical Particle Physics.ORCID iD: 0000-0002-3525-8349
2011 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, Vol. 2011, no 04, 052- p.Article in journal (Refereed) Published
Abstract [en]

We study the renormalization group (RG) running of the neutrino masses and the leptonic mixing parameters in two different extra-dimensional models, namely, the Universal Extra Dimensions (UED) model and a model, where the Standard Model (SM) bosons probe an extra dimension and the SM fermions are confined to a four-dimensional brane. In particular, we derive the beta function for the neutrino mass operator in the UED model. We also rederive the beta function for the charged-lepton Yukawa coupling, and confirm some of the existing results in the literature. The generic features of the RG running of the neutrino parameters within the two models are analyzed and, in particular, we observe a power-law behavior for the running. We note that the running of the leptonic mixing angle theta(12) can be sizable, while the running of theta(23) and theta(13) is always negligible. In addition, we show that the tri-bimaximal and the bimaximal mixing patterns at a high-energy scale are compatible with low-energy experimental data, while a tri-small mixing pattern is not. Finally, we perform a numerical scan over the low-energy parameter space to infer the high-energy distribution of the parameters. Using this scan, we also demonstrate how the high-energy theta(12) is correlated with the smallest neutrino mass and the Majorana phases.

Place, publisher, year, edition, pages
Springer-Verlag , 2011. Vol. 2011, no 04, 052- p.
Keyword [en]
Neutrino Physics, Field Theories in Higher Dimensions, Renormalization Group
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-34658DOI: 10.1007/JHEP04(2011)052ISI: 000290331700052ScopusID: 2-s2.0-80053266818OAI: diva2:426868
EU, FP7, Seventh Framework ProgrammeSwedish Research Council, 621-2008-4210EU, European Research Council, MANITOP
QC 20110627Available from: 2011-07-01 Created: 2011-06-13 Last updated: 2012-04-27Bibliographically approved
In thesis
1. Particle Phenomenology of Compact Extra Dimensions
Open this publication in new window or tab >>Particle Phenomenology of Compact Extra Dimensions
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is an investigation of the subject of extra dimensions in particle physics. In recent years, there has been a large interest in this subject. In particular, a number of models have been suggested that provide solutions to some of the problem with the current Standard Model of particle physics. These models typically give rise to experimental signatures around the TeV energy scale, which means that they could be tested in the next generation of high-energy experiments, such as the LHC. Among the most important of these models are the universal extra dimensions model, the large extra dimensions model by Arkani-Hamed, Dimopolous, and Dvali, and models where right-handed neutrinos propagate in the extra dimensions.

In the thesis, we study phenomenological aspects of these models, or simple modifications of them. In particular, we focus on Kaluza–Klein dark matter in universal extra dimensions models, different aspects of neutrino physics in higher dimensions, and collider phenomenology of extra dimensions. In addition, we consider consequences of the enhanced renormalization group running of physical parameters in higher-dimensional models.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. xiv, 98 p.
Trita-FYS, ISSN 0280-316X ; 2012:16
Higher-dimensional quantum field theories, universal extra dimensions, Arkani-Hamed–Dimopolous–Dvali (ADD) model, hierarchy problem, Kaluza– Klein dark matter, neutrino mass, seesaw mechanism, leptonic mixing, renormalization group running, collider phenomenology, Large Hadron Collider
National Category
Subatomic Physics
urn:nbn:se:kth:diva-93749 (URN)978-91-7501-305-3 (ISBN)
Public defence
2012-05-11, Sal FB53, Albanova, Roslagstullsbacken 21, Stockholm, 10:00 (English)
QC 20120427Available from: 2012-04-27 Created: 2012-04-25 Last updated: 2012-04-27Bibliographically approved

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