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Fine tuning in quintessence models with exponential potentials
(2002-10-01)
We explore regions of parameter space in a simple exponential model of the form V = V0 e-λ(Q/Mp) that are allowed by observational constraints. We find that the level of fine tuning in these models is not different from ...
Fine tuning in quintessence models with exponential potentials
(2002-10-01)
We explore regions of parameter space in a simple exponential model of the form V = V0 e-λ(Q/Mp) that are allowed by observational constraints. We find that the level of fine tuning in these models is not different from ...
Towards brane-antibrane inflation in type IIA: the holographic MQCD mode
(Springer, 2012-02-01)
We describe type IIA cosmological brane inflation scenarios based on the holographic MQCD model of Aharony et al [1]. The scenarios can be related via T-duality to the type IIB KKLMMT model [2]. They describe a probe brane ...
Towards brane-antibrane inflation in type IIA: the holographic MQCD mode
(Springer, 2012-02-01)
We describe type IIA cosmological brane inflation scenarios based on the holographic MQCD model of Aharony et al [1]. The scenarios can be related via T-duality to the type IIB KKLMMT model [2]. They describe a probe brane ...
Collider and dark matter searches in the inert doublet model from Peccei-Quinn symmetry
(Springer, 2016)
Weakly Interacting Massive Particles (WIMPs) and axions are arguably the most compelling dark matter candidates in the literature. Could they coexist as dark matter particles? More importantly, can they be incorporated in ...
CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
(Springer, 2021-11)
We extend to the highly degenerate case a recent approach for analyzing the sources of CP violation in baryogenesis models with quasi-degenerate neutrinos. In this approach an expansion of the resummed propagator around ...
An accelerating cosmology without dark energy
(IOP PUBLISHING LTD, 2009)
The negative pressure accompanying gravitationally-induced particle creation can lead to a cold dark matter (CDM) dominated, accelerating Universe (Lima et al. 1996 [1]) without requiring the presence of dark energy or a ...
Constraining f(R) theories with cosmography
(IOP Publishing, 2013-08)
A method to set constraints on the parameters of extended theories of gravitation is presented. It is based on the comparison of two series expansions of any observable that depends on H(z). The first expansion is of the ...