On the Decoupling of Heavy Modes in Kaluza-Klein Theories
نویسنده
چکیده
In this paper we examine the 4-dimensional effective theory for the light KaluzaKlein (KK) modes. Our main interest is in the interaction terms. We point out that the contribution of the heavy KK modes is generally needed in order to reproduce the correct predictions for the observable quantities involving the light modes. As an example we study in some detail a 6-dimensional Einstein-Maxwell theory coupled to a charged scalar and fermions. In this case the contribution of the heavy KK modes are geometrically interpreted as the deformation of the internal space. Email: [email protected] Email: [email protected] Email: [email protected] 1
منابع مشابه
Phenomenology of neutrino physics in the Kaluza-Klein theories of low scale gravity
We discuss the phenomenological consequences of theories which describe sterile neutrinos in large extra dimensions. We show that the Kaluza-Klein tower of the singlet neutrinos, albeit tiny individual contribution in electroweak processes, act cumulatively, giving rise to non-universality of the weak interactions of the light neutrinos and to flavour-violating radiative processes. Owing to the...
متن کاملElectroweak and Flavor Physics in Extensions of the Standard Model with Large Extra Dimensions ∗
We study the implications of extra dimensions of size R ∼ 1/TeV on electroweak and flavor physics due to the presence of Kaluza-Klein excitations of the SM gauge-bosons. We consider several scenarios with the SM fermions either living in the bulk or being localized at different points of an extra dimension. Global fits to electroweak observables provide lower bounds on 1/R, which are genericall...
متن کاملNew Regulators for Quantum Field Theories with Compactified Extra Dimensions — Part II : Ultraviolet Finiteness and Effective Field Theory Implementation —
In a previous companion paper [arXiv:0712.3532], we proposed two new regulators for quantum field theories in spacetimes with compactified extra dimensions. Unlike most other regulators which have been used in the extradimension literature, these regulators are specifically designed to respect the original higher-dimensional Lorentz and gauge symmetries that exist prior to compactification, and...
متن کاملLaboratory Limits on Theories with Sterile Neutrinos in the Bulk
We discuss the phenomenological consequences of theories which describe sterile neutrinos in large extra dimensions, in the so-called bulk. We briefly outline how the cumulative non-decoupling effect due to the tower of Kaluza-Klein singlet neutrinos may equivalently be described by a higher-dimensional effective theory with original order-unity Yukawa couplings. Based on this cumulative phenom...
متن کاملProbing the Nature of Compactification with Kaluza-Klein Excitations at the Large Hadron Collider
It is shown that the nature of compactification of extra dimensions in theories of large radius compactification can be explored in several processes at the Large Hadron Collider (LHC). Specifically it is shown that the characteristics of the Kaluza-Klein (KK) excitations encode information on the nature of compactification, i.e., on the number of compactified dimensions as well as on the type ...
متن کامل