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Discretized gravity in 6D warped space
Physik-Department, Technische Universität München.
KTH, School of Engineering Sciences (SCI), Theoretical Physics.
Department of Physics, Oklahoma State University.
2007 (English)In: Nuclear Physics B, ISSN 0550-3213, Vol. 278, no 1-3, 32-63 p.Article in journal (Refereed) Published
Abstract [en]

We consider discretized gravity in six dimensions. where the two extra dimensions have been compactified on a hyperbolic disk of constant curvature. We analyze different realizations of lattice gravity on the disk at the level of an effective field theory for massive gravitons. It is shown that the observed strong coupling scale of lattice gravity in discretized five-dimensional flat or warped space can be increased if the latticized fifth dimension is wrapped around a hyperbolic disk that has a non-trivial warp factor. As an application, we also study the generation of naturally small Dirac neutrino masses via a discrete volume suppression mechanism and discuss briefly collider implications of our model.

Place, publisher, year, edition, pages
2007. Vol. 278, no 1-3, 32-63 p.
Keyword [en]
National Category
Other Engineering and Technologies
URN: urn:nbn:se:kth:diva-7440DOI: 10.1016/j.nuclphysb.2007.05.009ISI: 000249711100002ScopusID: 2-s2.0-34548124935OAI: diva2:12467
QC 20100716. Uppdaterad från In press till Published 20100716.Available from: 2007-09-03 Created: 2007-09-03 Last updated: 2010-07-16Bibliographically approved
In thesis
1. Aspects of Dimensional Deconstruction and Neutrino Physics
Open this publication in new window or tab >>Aspects of Dimensional Deconstruction and Neutrino Physics
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

The existence of at or curved extra spatial dimensions provides new insights into several of the problems which face the Standard Model of particle physics, including the gauge hierarchy problem, the smallness of neutrino masses, and the dark matter problem. However, higher-dimensional gauge theories are not renormalizable and can only be considered as low-energy effective theories, with limited applicability. Dimensional deconstruction provides a class of manifestly gauge invariant possible ultraviolet completions of higher-dimensional gauge theories, formulated within conventional quantum eld theory. In dimensional deconstruction, the fundamental theory is a four-dimensional quantum eld theory and extra spatial dimensions are generated dynamically at low energies. In this thesis, we study di erent applications of dimensional deconstruction in the contexts of neutrino masses, mixing and oscillations, Kaluza{Klein dark matter, and e ective eld theories for discretized higher-dimensional gravity.

A different possibility to understand the smallness of neutrino masses is provided by the see-saw mechanism. This is a genuinely four-dimensional mechanism, where the light neutrino masses are induced by the addition of heavy right-handed Majorana neutrinos or by other heavy degrees of freedom, such as scalar SU(2)L triplet elds. It has the attractive feature of simultaneously providing a mechanism for generating the observed baryon asymmetry of the Universe. We study in this context a specific left-right symmetric see-saw model.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. x, 104 p.
Trita-FYS, ISSN 0280-316X ; 2007:48
Dimensional deconstruction, higher-dimensional gauge theories, discretized gravity, neutrino mass, neutrino mixing, neutrino oscillations
National Category
Other Engineering and Technologies
urn:nbn:se:kth:diva-4480 (URN)978-91-7178-728-6 (ISBN)
Public defence
2007-09-19, Sal F3, KTH, Lindstedtsvägen 26, Stockholm, 10:00 (English)
QC 20100716Available from: 2007-09-03 Created: 2007-09-03 Last updated: 2010-07-16Bibliographically approved

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