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Measurement of R(D) and R(D∗) with a Semileptonic Tagging Method
(American Physical Society, 2020-04-24)
The experimental results on the ratios of branching fractions R(D) = B((B) over bar -> D tau(-)(nu) over bar (tau))/B((B) over bar -> Dl(-)(nu) over bar (e)) and R(D*) = B((B) over bar -> D*tau(-)(nu) over bar (tau))/B((B) ...
On the universality of MOG weak field approximation at galaxy cluster scale
(Elsevier, 2017-07-10)
In its weak field limit, Scalar-tensor-vector gravity theory introduces a Yukawa-correction to the gravitational potential. Such a correction depends on the two parameters, alpha which accounts for the modification of the ...
Erizaintzako prestakuntzaren eboluzio historikoa Gipuzkoan. Praktiketako gaitasunen diseinua egungo beharrei egokitzeko.
(Servicio Editorial de la Universidad del País Vasco/Euskal Herriko Unibertsitatearen Argitalpen Zerbitzua, 2014-10-20)
Doktore-tesi honen helburuak dira: Erizaintzako prestakuntzak Gipuzkoan izan duen eboluzio historikoa aztertzea, Europan izandako eboluzioarekin lotuz; eta, Europar Unibertsitate Eremu berria sortzeak eragin dituen aldaketen ...
f (R) Gravity Modifications: From The Action To The Data
(Springer, 2018-03-13)
It is a very well established matter nowadays that many modified gravity models can offer a sound alternative to General Relativity for the description of the accelerated expansion of the universe. But it is also equally ...
Cosmological constrains on fast transition Unified Dark Matter models
(IOP Publishing, 2015)
In this work we show the results obtained applying a Unified Dark Matter (UDM) model with a fast transition to a set of cosmological data. Two different functions to model the transition are tested, and the feasibility of ...
Physical cosmology with complete samples of massive clusters of galaxies
(2017-07-13)
El objetivo central de esta tesis ha sido usar grandes conjuntos de cúmulos de galaxias, las estructuras gravitacionalmente ligadas más masivas del Universo, para realizar medidas de distintos fenómenos que tienen su origen ...
Observational constraints on the unified dark matter and dark energy model based on the quark bag model
(Elsevier, 2014-06-02)
In this work we investigate if a small fraction of quarks and gluons, which escaped hadronization and survived as a uniformly spread perfect fluid, can play the role of both dark matter and dark energy. This fluid, as ...
Cosmology in an accelerated universe: observations and phenomenology
(2012-07-27)
En las últimas décadas la cosmología ha experimentado notables avances como consecuencia del desarrollo de nuevos experimentos que nos han abastecido con precisos datos observacionales. La calidad de estos datos ha permitido ...
Anisotropic expansion and SNIa: An open issue
(Elsevier, 2015-02-04)
We review the appropriateness of using SNIa observations to detect potential signatures of anisotropic expansion in the Universe. We focus on Union2 and SNLS3 SNIa datasets and use the hemispherical comparison method to ...
Forecast And Analysis Of The Cosmological Redshift Drift
(Springer, 2018-01-08)
The cosmological redshift drift could lead to the next step in high-precision cosmic geometric observations, becoming a direct and irrefutable test for cosmic acceleration. In order to test the viability and possible ...