KaluzaKlein states from large extra dimensions
Abstract
We consider the novel KaluzaKlein (KK) scenario where gravity propagates in the (4+n)dimensional bulk of spacetime, while gauge and matter fields are confined to the (3+1)dimensional world volume of a brane configuration. For simplicity we assume compactification of the extra n dimensions on a torus with a common scale R, and identify the massive KK states in the fourdimensional spacetime. For a given KK level n> there is one spin2 state, (n1) spin1 states, and n(n1)/2 spin0 states, all mass degenerate. We construct the effective interactions between these KK states and ordinary matter fields (fermions, gauge bosons, and scalars). We find that the spin1 states decouple and that the spin0 states only couple through the dilaton mode. We then derive the interacting Lagrangian for the KK states and standard model fields, and present the complete Feynman rules. We discuss some lowenergy phenomenology for these new interactions for the case when 1/R is small compared to the electroweak scale, and the ultraviolet cutoff of the effective KK theory is on the order of 1 TeV.
 Publication:

Physical Review D
 Pub Date:
 May 1999
 DOI:
 10.1103/PhysRevD.59.105006
 arXiv:
 arXiv:hepph/9811350
 Bibcode:
 1999PhRvD..59j5006H
 Keywords:

 11.10.Kk;
 11.25.Mj;
 13.90.+i;
 Field theories in dimensions other than four;
 Compactification and fourdimensional models;
 Other topics in specific reactions and phenomenology of elementary particles;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 28 pages, 6 figures. revised version, misprints corrected