Nonlocal symmetry breaking in Kaluza-Klein theories.
نویسندگان
چکیده
Scherk-Schwarz gauge symmetry breaking of a D-dimensional field theory model compactified on a circle is analyzed. It is explicitly shown that forbidden couplings in the unbroken theory appear in the one-loop effective action only in a nonlocal way, implying that they are finite at all orders in perturbation theory. This result can be understood as a consequence of the local gauge symmetry, but it holds true also in the global limit.
منابع مشابه
Symmetry Breaking of Gauge Theories via Internal Space Dynamics
In this paper, I explain how gauge symmetry can be broken in a geometric way, à la Kaluza-Klein. In higher dimensional gravitational theories, one usually considers the extra dimensions to be “frozen” in time. However, the internal manifold is actually a dynamic entity. For example, its metric can change even if one expects its topological properties to be invariant. It is conceivable then, tha...
متن کاملQuintessential Transition of the Internal Manifold
In this paper, I study the dynamics of the Kaluza-Klein internal manifold using its “shape” and the “size” as collective coordinates. The essential motivation is to be able to explain symmetry breaking in gauge theories through a transition of the internal manifold from a symmetrical metric space to a less symmetric one. We find that this may be possible depending on the values of certain group...
متن کاملKaluza - Klein Excitations and Electroweak Symmetry Breaking
We explore the possibility that the Kaluza-Klein graviton states induce electroweak symmetry breaking. We also demonstrate that electroweak symmetry breaking could have a large impact on KK phenomenology. Recently, it has become clear that quantum gravity as described using extra dimensions, and the associated Kaluza-Klein excitations, could have effects at scales far below the measured Planck ...
متن کاملUnitarity constraints on top quark signatures of Higgsless models
We use conditions for unitarity cancellations to constrain the couplings of the top and bottom quarks to Kaluza-Klein modes in Higgsless models of electroweak symmetry breaking. An example for the mass spectrum of quark resonances in a theory space model is given and the implications for the collider phenomenology in the top sector are discussed, comparing to signatures of Little Higgs and stro...
متن کاملFrom Tree Unitarity to Top Quark Physics in 5D Higgsless Models
In five dimensional models of Higgsless electroweak symmetry breaking, tree level unitarity in gauge boson scattering is restored by the exchange of gauge boson KaluzaKlein modes instead of a Higgs boson. Unitarity of scattering amplitudes involving top quarks requires also the Kaluza-Klein modes of the third family quarks. It is shown that the relevant unitarity cancellations are consistent wi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 87 25 شماره
صفحات -
تاریخ انتشار 2001