Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-11
Phys.Lett. B517 (2001) 445-449
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 1 figure. The discussion on the distribution giving rise to couplings suppressed by exp(-M/Lambda) is revised and the
Scientific paper
10.1016/S0370-2693(01)00989-3
We analyze the one-loop ultraviolet sensitivity of the Higgs mass in a five-dimensional supersymmetric theory compactified on the orbifold S^1/Z_2, with superpotential localized on a fixed-point brane. Four-dimensional supersymmetry is broken by Scherk-Schwarz boundary conditions. Kaluza-Klein interactions are regularized by means of a brane Gaussian distribution along the extra dimension with length l_s\simeq\Lambda^{-1}_s, where \Lambda_s is the cutoff of the five-dimensional theory. The coupling of the n-mode, with mass M^{(n)}, acquires the n-dependent factor exp{-(M^{(n)}/\Lambda_s)^2/2}, which makes it to decouple for M^{(n)}\gg \Lambda_s. The sensitivity of the Higgs mass on \Lambda_s is strongly suppressed and quadratic divergences cancel by supersymmetry. The one-loop correction to the Higgs mass is finite and equals, for large values of \Lambda_s, the value obtained by the so-called KK-regularization.
Delgado Antonio
Gersdorff Gero von
John Peter
Quiros Mariano
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