We review the renormalization of the ground state solution of extended supergravity and supersymmetric Kaluza-Klein theories. The computation of an adiabatic expansion of the effective action to the one-loop order yields the result that a linear superfield insertion in the superpotential is needed, in order to renormalize the nonvanishing one-particle-irreducible one-point functions, whereas supersymmetry is preserved at each extremum of the effective potential. The calculation of the one-particle-irreducible two- and three-point functions shows that neither the mass nor the interaction lagrangians get renormalized to the one-loop order. We conclude that the one-loop effects proportional to the contraction parameter of the curved background space force a violation of the no-renormalization theorem.
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Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
Sez Roma1 INFN, I-00185 Rome, ItalyUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
Arzano, Michele
Gubitosi, Giulia
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Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Theoret Phys, London SW7 2BZ, EnglandUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
Gubitosi, Giulia
Magueijo, Joao
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Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Theoret Phys, London SW7 2BZ, EnglandUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
Magueijo, Joao
Amelino-Camelia, Giovanni
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Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
Sez Roma1 INFN, I-00185 Rome, ItalyUniv Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy