منابع مشابه
Planck Scale Effects on the Majoron
The hypothesis that non-perturbative gravitational effects lead to explicit breaking of global symmetries is considered in the context of Majoron models. We find that the nonvanishing Majoron mass generated by these effects can overclose the universe unless the massive Majoron is unstable. The cosmological mass density constraints can then be satisfied only if V BL < 10 TeV, where V BL is the s...
متن کاملPlanck Scale Symmetry Breaking and Majoron Physics
Majoron models provide neutrino masses via the spontaneous breaking of a global U(1) symmetry. However, it may be argued that all global symmetries will be explicitly violated by gravita-tional effects. We show that it is possible to preserve most of the usual features of majoron models by invoking U(1) B−L to be a gauge symmetry and adding a second singlet scalar field. The majoron gets a smal...
متن کاملEffect of CP-odd Planck-scale-induced operators on the Majoron scale.
We extend a recent work on the effect of non-perturbative Planck scale effects on models with spontaneously broken global B-L symmetry, where it was shown that scale V BL of this symmetry must be less than 10 TeV. We show that, if the Planck scale effects break CP invariance, an allowed window for
متن کاملPlanck-scale effects on WIMP dark matter
*Correspondence: Sofiane M. Boucenna, Edificio de Institutos de Paterna, Instituto de Física Corpuscular – C.S.I.C./ Universitat de València, Apartado 22085, E–46071 València, Spain e-mail: [email protected] There exists a widely known conjecture that gravitational effects violate global symmetries. We study the effect of global-symmetry violating higher-dimension operators induced by Planck-...
متن کاملCosmological constraint on the scale of the supersymmetric singlet Majoron.
In a supersymmetric theory with a spontaneously broken global symmetry, G, if the scale of supersymmetry breaking, M s is smaller than the scale M G of the global symmetry, the Nambu-Goldstone boson, χ is accompanied by two massive superpartners (a fermionic, Ψ χ and a scalar boson, σ χ) with mass of order M s. Cosmological considerations imply stringent constraints on the couplings of Ψ χ and ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1993
ISSN: 0370-2693
DOI: 10.1016/0370-2693(93)90887-n