Ultraviolet sensitivity of rare decays in nonuniversal extra dimensional models
Abstract
We consider a nonuniversal five-dimensional model in which fermions are localized on a four-dimensional brane, while gauge bosons and a scalar doublet can travel in the bulk. As a result of Kaluza-Klein number nonconservation at the brane-bulk intersection, the ultraviolet divergence does not cancel out in some physical observables. For example, the Bd→l+l- decay amplitude is linearly divergent, while the B-B¯ mixing amplitude is log divergent. We attempt to identify the exact source of this nonrenormalizability. We compare and contrast our results with those obtained in the universal five-dimensional model where all particles travel in the extra dimension.
- Publication:
-
Physical Review D
- Pub Date:
- April 2004
- DOI:
- 10.1103/PhysRevD.69.076009
- arXiv:
- arXiv:hep-ph/0309110
- Bibcode:
- 2004PhRvD..69g6009D
- Keywords:
-
- 11.10.Kk;
- 12.60.-i;
- Field theories in dimensions other than four;
- Models beyond the standard model;
- High Energy Physics - Phenomenology
- E-Print:
- Latex, 11 pages, uses axodraw.sty