Tunneling into Extra Dimension and High-Energy Violation of Lorentz Invariance | Zendy

Sergei Dubovsky | Zendy

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Tunneling into Extra Dimension and High-Energy Violation of Lorentz Invariance

Author(s) -

Sergei Dubovsky

Publication year - 2002

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2002/01/012

Subject(s) - lorentz covariance , physics , cpt symmetry , graviton , lorentz transformation , scalar (mathematics) , fermion , gauge theory , gauge boson , universal extra dimension , invariance principle , extra dimensions , theoretical physics , boson , symmetry (geometry) , quantum mechanics , quantum electrodynamics , classical mechanics , gravitation , mathematics , geometry , linguistics , philosophy

We consider a class of models with infinite extra dimension, where bulk spacedoes not possess SO(1,3) invariance, but Lorentz invariance emerges as anapproximate symmetry of the low-energy effective theory. In these models, themaximum attainable speeds of the graviton, gauge bosons and scalar particlesare automatically equal to each other and smaller than the maximum speed in thebulk. Additional fine-tuning is needed in order to assure that the maximumattainable speed of fermions takes the same value. A peculiar feature of ourscenario is that there are no truly localized modes. All four-dimensionalparticles are resonances with finite widths. The latter depends on the energyof the particle and is naturally small at low energies.Comment: 21 pages, references and comments added, final version to appear in JHE

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