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oai:docta.ucm.es:20.500.14352/507152023-08-25T15:12:52Zcom_20.500.14352_14col_20.500.14352_15

Higgs effective potential in the littlest Higgs model at the one-loop level Dobado González, Antonio Tabares Cheluci, Lourdes Peñaranda , Siannah 53 Chiral Perturbation-Theory Supersymmetry Symmetry Física (Física) 22 Física © 2007 The American Physical Society. This work is supported by DGICYT (Spain) under Project No. BPA2005-02327. The work of S. P. is supported by the I3P-Contract of CSIC at IFIC—Instituto de Física Corpuscular, Valencia. The work of L. TabaresCheluci is supported by a FPU grant from the Spanish M.E.C. In this work we compute the contributions to the Higgs effective potential coming from the fermion and gauge boson sectors at the one-loop level in the context of the SU(5)/SO(5) littlest Higgs (LH) model using a cutoff Lambda and including all finite parts. We consider both, the (SU(2) x U(1))(1) x (SU(2) x U(1))(2) and the (SU(2) x U(1))(1) x (SU(2) x U(1)) gauge group versions of the LH model. We also show that the Goldstone bosons present in the model do not contribute to the effective potential at the one-loop level. Finally, by neglecting the contribution of higher dimensional operators, we discuss the restrictions that the new one-loop contributions set on the parameter space of the LH model and the need to include higher loop corrections to the Higgs potential. DGICYT (Spain) Instituto de Física Corpuscular, Valencia FPU grant from the Spanish M.E.C. Depto. de Física Teórica Fac. de Ciencias Físicas TRUE pub 2023-06-20T10:35:55Z 2023-06-20T10:35:55Z 2007-04 journal article https://hdl.handle.net/20.500.14352/50715 1550-7998 10.1103/PhysRevA.75.083527 eng BPA2005-02327 I3P-CSIC open access application/pdf American Physical Society