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Higgs physics in the large N limit

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In this paper we study the large N limit of the Standard Model Higgs sector with N lambda, Ng(2) and Ng('2) constant and N being the number of would-be Goldstone bosons, Despite the simplicity of this method at leading order, its results satisfy simultaneously important requirements such as unitarity and the low-energy theorems in contrast with other more conventional approaches. Moreover, it is fully compatible with the Equivalence Theorem and it yields a consistent description of the Higgs boson mass and width, Finally we have also included a phenomenological discussion concerning the applications of this method to the LHC.

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©1996 Published by Elsevier Science. This work has been supported in part by the Ministerio de Education y Ciencia (Spain) (CICYTAEN95-1285-E) and COLCIENCIAS (Columbia). J.R.P. would like to thank the Theoretical Group at Berkeley for their kind hospitality, as well as the Jaime de1 Amo Foundation for a fellowship. Partial support by US DOE under contract DE-ACO3-76SFOOO98 is gratefully acknowledged.

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