Decoupling of supersymmetric particles



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Dobado González, Antonio and Herrero, M. J. and Peñaranda, S. (1999) Decoupling of supersymmetric particles. European Physical Journal C, 7 (2). pp. 313-339. ISSN 1434-6044

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The possibility of a heavy supersymmetric spectrum at the Minimal Supersymmetric Standard Model is considered and the decoupling from the low energy electroweak scale is analyzed in detail. The formal proof of decoupling of supersymmetric particles from low energy physics is stated in terms of the effective action for the particles of the Standard Model that results by integrating out all the sparticles in the limit where their masses are larger than the electroweak scale. The computation of the effective action for the standard electroweak gauge bosons W+/-, Z and gamma is performed by integrating out all the squarks, sleptons, charginos and neutralinos to one-loop. The Higgs sector is not considered in this paper. The large sparticle masses limit is also analyzed in detail. Explicit analytical formulae for the two-point functions of the electroweak gauge bosons to be Valid in that limit are presented. Finally, the decoupling of sparticles in the S, T and U parameters is studied analitically. A discussion on how the decoupling takes place in terms of both the physical sparticle masses and the not-physical mass parameters as the mu-parameter and the soft-breaking parameters is included.

Item Type:Article
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© Springer-Verlag 1999

Uncontrolled Keywords:Ultra Heavy Fermions, Higgs Bosons; Weak Interactions, N=1 Supergravity, Standard Model, One-Loop, Mssm, Mass, Spectrum, Renormalization
Subjects:Sciences > Physics
ID Code:22726
Deposited On:09 Sep 2013 18:15
Last Modified:31 Dec 2020 00:01

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