Buscar
Mostrando ítems 51-60 de 100
Depths of Maximum of Air-Shower Profiles at the Pierre Auger Observatory: II. Composition Implications.
(American Physical Society, 2014-12)
Using the data taken at the Pierre Auger Observatory between December 2004 and December 2012, we have examined the implications of the distributions of depths of atmospheric shower maximum (Xmax), using a hybrid technique, ...
Ultra-high energy neutrinos at the Pierre Auger Observatory
(Sociedade Brasileira de Fisica, 2016)
Neutrinos in the sub-EeV energy range and above can be detected with the Surface Detector (SD) of the Pierre Auger Observatory. They can be identified through the broad time structure of the signals induced in the SD ...
Variation in the fine-structure constant and the distance-duality relation
(IOP Publishing, 2020-06)
The possibility of variation of the fundamental constants of nature has been a long-standing question, with important consequences for fundamental physics and cosmology. In particular, it has been shown that variations in ...
A muon-based observable for a photon search at 30-300PeV
(Elsevier Science, 2020-01)
The observation of an ultra-high energy photon component of the cosmic radiation is one of the open problems in Astroparticle Physics. The stringent theoretical and experimental upper limits to the photon flux above 100 ...
On the capture rates of big bang neutrinos by nuclei within the Dirac and Majorana hypotheses
(IOP Publishing, 2018-10)
The capture rates of non-relativistic neutrinos on beta decaying nuclei depends on whether their mass is Dirac or Majorana. It is known that for relic neutrinos from the big-bang, and within minimal assumptions, the rate ...
Constraining quantum collapse inflationary models with CMB data
(IOP Publishing, 2016-12)
The hypothesis of the self-induced collapse of the inflaton wave function was proposed as responsible for the emergence of inhomogeneity and anisotropy at all scales. This proposal was studied within an almost de Sitter ...
The atacama cosmology telescope: cosmological parameters from three seasons of dataJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICSJ COSMOL ASTROPART P
(INSTITUTE OF PHYSICS PUBLISHING, 2013)
Boltzmann hierarchies for self-interacting warm dark matter scenarios
(IOP Publishing, 2020-09)
We provide a general framework for self-interacting warm dark matter (WDM) in cosmological perturbations, by deriving from first principles a Boltzmann hierarchy which retains certain independence from a particular interaction ...
Relativistic viscous effects on the primordial gravitational waves spectrum
(IOP Publishing, 2021-06)
We study the impact of the viscous effects of the primordial plasma on the evolution of the primordial gravitational waves (pGW) spectrum from Inflation until today, considering a self-consistent interaction that incorporates ...
Vector fuzzy dark matter, fifth forces, and binary pulsars
(IOP Publishing, 2018-10)
We study the secular effects that an oscillating background ultralight (fuzzy) cosmological vector field has on the dynamics of binary systems; such effects appear when the field and the binary are in resonance. We first ...