IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Supersymmetry and R-symmetry breaking in models with non-canonical Kahler potential
Autor/es:
LEON ALDROVANDI, DIEGO MARQUÉS
Revista:
JOURNAL OF HIGH ENERGY PHYSICS - (Online)
Referencias:
Año: 2008
ISSN:
1029-8479
Resumen:
We analyze several aspects of R-symmetry and supersymmetry
breaking in generalized O'Raifeartaigh models with non-canonical
Kähler potential. Some conditions on the Kähler potential
are derived in order for the non-supersymmetric vacua to be
degenerate. We calculate the Coleman-Weinberg (CW) effective
potential for general quiral non-linear sigma models and then study
the 1-loop quantum corrections to the pseudo-moduli space. For
R-symmetric models, the quadratic dependence of the CW potential
with the ultraviolet cutoff scale disappears. We also show that the
conditions for R-symmetry breaking are independent of this scale and
remain unchanged with respect to those of canonical models. This is,
R-symmetry can be broken when generic R-charge assignments to the
fields are made, while it remains unbroken when only fields with
R-charge 0 and 2 are present. We further show that these models
can keep the runaway behavior of their canonical counterparts and
also new runaway directions can be induced. Due to the runaway
directions, the non-supersymmetric vacua is metastable.