Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Di Clemente, V."'
Publikováno v:
Phys.Rev. D71 (2005) 103517
We propose a model of cosmology and particle physics in which all relevant scales arise in a natural way from an intermediate string scale. We are led to assign the string scale to the intermediate scale M_* \sim 10^{13} GeV by four independent piece
Externí odkaz:
http://arxiv.org/abs/hep-ph/0408336
Publikováno v:
Phys.Rev. D70 (2004) 023501
We discuss the potentially important role played by preheating in certain variants of the curvaton mechanism in which isocurvature perturbations of a D-flat (and F-flat) direction become converted to curvature perturbations during reheating. We analy
Externí odkaz:
http://arxiv.org/abs/hep-ph/0311237
We analyze the phenomenology of the Higgs sector in a 5D model compactified on an $S_1/Z_2$ orbifold with a compactification scale $M_C \sim {\mathcal O}(TeV)$ where supersymmetry breaking is localized on a brane at one of the fixed points. We show t
Externí odkaz:
http://arxiv.org/abs/hep-ph/0211152
Publikováno v:
Phys.Rev. D67 (2003) 103516
We propose an alternative implementation of the curvaton mechanism for generating the curvature perturbations which does not rely on a late decaying scalar decoupled from inflation dynamics. In our mechanism the supersymmetric Higgs scalars are coupl
Externí odkaz:
http://arxiv.org/abs/hep-ph/0211011
Publikováno v:
Phys.Rev. D67 (2003) 083504
We embed the supersymmetric standard model of hybrid inflation based on the next-to-minimal superpotential term $\lambda NH_uH_d$ supplemented by an inflaton term $\kappa \phi N^2$, into an extra-dimensional framework, in which all the Higgs fields a
Externí odkaz:
http://arxiv.org/abs/hep-ph/0211012
Publikováno v:
JHEP 0201 (2002) 041
For a light enough Higgs boson, the effective potential of the Standard Model develops a dangerous instability at some high energy scale, Lambda, signalling the need for new physics below that scale. On the other hand, a typical low-energy remnant of
Externí odkaz:
http://arxiv.org/abs/hep-ph/0201160
Publikováno v:
Nucl.Phys. B617 (2001) 71-100
We consider the problem of supersymmetry and electroweak breaking in a 5d theory compactified on an $S^{1}/Z_{2}$ orbifold, where the extra dimension may be large or small. We consider the case of a supersymmetry breaking 4d brane located at one of t
Externí odkaz:
http://arxiv.org/abs/hep-ph/0107290
Publikováno v:
Nucl.Phys. B581 (2000) 61-72
We apply a general formalism for the improved effective potential with several mass scales to compute the scale M of new physics which is needed to stabilize the Standard Model potential in the presence of a light Higgs. We find, by imposing perturba
Externí odkaz:
http://arxiv.org/abs/hep-ph/0002205
Publikováno v:
Phys.Rev. D62 (2000) 053005
If neutrino masses are produced by a see-saw mechanism the Standard Model prediction for the Higgs mass window (defined by upper (perturbativity) and lower (stability) bounds) can be substantially affected. Actually the Higgs mass window can close co
Externí odkaz:
http://arxiv.org/abs/hep-ph/9904295
Publikováno v:
Nucl.Phys. B553 (1999) 511-530
We consider the problem of improving the effective potential in mass independent schemes, as e.g. the $\MSbar$ or $\DRbar$ renormalization scheme, in the presence of an arbitrary number of fields with $\phi$-dependent masses $M_i(\phi_c)$. We use the
Externí odkaz:
http://arxiv.org/abs/hep-ph/9809275