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Technical Naturalness on a Codimension-2 Brane | | C.P. Burgess
; D. Hoover
; G. Tasinato
; | | Date: |
2 Mar 2009 | | Abstract: | We compute how threshold effects obtained by integrating out a heavy particle
localized on a codimension-2 brane influence the properties of the brane and
the bulk fields it sources in D=d+2 dimensions. We do so using a recently
developed formalism for matching the characteristics of higher codimension
branes to the properties of the bulk fields they source. We show that although
the dominant dependence on a heavy mass M that is induced in the low-energy
codimension-2 tension has the generic size expected, T_2 propto M^d, the
very-low-energy effective potential governing the on-brane curvature once bulk
KK modes are integrated out can be additionally suppressed, by factors of order
k^2 M^d, where k is the bulk gravitational coupling. In the special case of a
codimension-2 brane in a 6D supersymmetric bulk we also estimate the size of
the contributions of short-wavelength bulk loops near the brane, and find these
can be similarly suppressed. | | Source: | arXiv, 0903.0402 | | Services: | Forum | Review | PDF | Favorites | |
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