Results 21 to 30 of about 332,113 (340)
Light dark matter from dark sector decay [PDF]
Phys.Lett. B815(2021)136118, 2020 We study the possibility that light dark matter can be produced with right relic density by the decay of other dark sector particles. We study this possibility in a model with right-handed neutrinos, a dark sector singlet scalar and a dark sector singlet fermion.
arxiv +1 more source
International Journal of Modern Physics D, 2004 Extra-dimensional theories contain additional degrees of freedom related to the geometry of the extra space which can be interpreted as new particles. Such theories allow to reformulate most of the fundamental problems of physics from a completely different point of view.
Ruiz Cembranos, José Alberto +2 more
openaire +3 more sources
Acta Societatis Botanicorum Poloniae, 2015 Ceratopteris thalictroides is a water fern very sensitive to both dehydration and low temperature. This study focuses on the cryopreservation of this species by encapsulation-dehydration technique, in particular on the effects of pre-culture step ...
Damian Makowski +2 more
doaj +1 more source
Inelastic Dark Matter from Dark Higgs Boson Decays at FASER [PDF]
, 2021 We consider inelastic dark matter scenarios with dark photon mediator and a dark Higgs boson. The dark Higgs boson spontaneously breaks the gauge symmetry associated with the dark photon, and gives the mass to the dark photon and the mass difference to dark particles.
arxiv +1 more source
Dark microglia: Why are they dark? [PDF]
Communicative & Integrative Biology, 2016 Using transmission electron microscopy (TEM) we recently characterized a microglial phenotype that is induced by chronic stress, fractalkine receptor deficiency, aging, or Alzheimer disease pathology. These 'dark' microglia appear overly active compared with the normal microglia, reaching for synaptic clefts, and extensively engulfing pre-synaptic axon
Baptiste Lacoste +3 more
openaire +4 more sources
Acta Societatis Botanicorum Poloniae, 2014 Within the proliferative period of spermatogenesis in Chara vulgaris, the progression throughout successive cell divisions in antheridial filaments is greatly influenced by changes in photoperiodic conditions.
Maria Kwiatkowska +2 more
doaj +1 more source
Influence of Lighting and Laser Irradiation on the Germination of Caper Seeds
Agriculture, 2022 Caper seeds present difficulties in their germination, which has been studied by several research teams. It is known that light can release dormancy in some seeds, but its effect on caper seed germination has not yet been deeply studied.
María Laura Foschi +3 more
doaj +1 more source
Nonlinear Cosmogony of “Black Mirror”: Darkness as a Symbol of a Distorted Chronotope in the Futuristic Netflix Series [PDF]
Философия и космология, 2020 The article is devoted to the study of the symbolic significance of light and darkness in the life of modern humanity. In order to analize this problem, the author turned to “Black Mirror”, a sciencefiction anthology released by Netflix company.
Anhelina Anhelova
doaj +1 more source
Dark group: dark energy and dark matter [PDF]
Physics Letters B, 2004 We study the possibility that a dark group, a gauge group with particles interacting with the standard model particles only via gravity, is responsible for containing the dark energy and dark matter required by present day observations. We show that it is indeed possible and we determine the constrains for the dark group.
openaire +3 more sources
From Dark Energy & Dark Matter to Dark Metric [PDF]
Foundations of Physics, 2009 It is nowadays clear that General Relativity cannot be the definitive theory of Gravitation due to several shortcomings that come out both from theoretical and experimental viewpoints. At large scales (astrophysical and cosmological) the attempts to match it with the latest observational data lead to invoke Dark Energy and Dark Matter as the bulk ...
S. Mercadante +4 more
openaire +5 more sources