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VACUUM STABILITY IN SPLIT SUSY AND LITTLE HIGGS MODELS

ALAKABHA DATTA

Department of Physics, University of Toronto, Toronto, Ontario, Canada, M56 1A7, Canada

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and

XINMIN ZHANG

CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China

Institute of High Energy Physics, Beijing 100039, P.R. China

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https://doi.org/10.1142/S0217751X06029521Cited by:5 (Source: Crossref)

Abstract

We study the stability of the effective Higgs potential in the split supersymmetry and Little Higgs models. In particular, we study the effects of higher dimensional operators in the effective potential on the Higgs mass predictions. We find that the size and sign of the higher dimensional operators can significantly change the Higgs mass required to maintain vacuum stability in Split SUSY models. In the Little Higgs models the effects of higher dimensional operators can be large because of a relatively lower cutoff scale. Working with a specific model we find that a contribution from the higher dimensional operator with coefficient of O(1) can destabilize the vacuum.

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