Results 11 to 20 of about 1,358,895 (382)
Physical Review D, 2021 A new $U(1)$ dark gauge group coupled to the Standard Model (SM) via the kinetic mixing portal provides a natural dark matter candidate in the form of the Higgs field, $h_d$, responsible for generating the mass of the dark photon, $ _d$. We show that the condition $m_{h_d}\leq m_{ _d}$, together with smallness of the kinetic mixing parameter ...
Cristina Mondino +3 more
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Dark matter and dark radiation [PDF]
Physical Review D, 2009 14 pages, 6 figures Updated equations and ...
Ackerman, Lotty +3 more
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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
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Angular Momentum of Topologically Structured Darkness. [PDF]
Physical Review Letters, 2017 We theoretically analyze and experimentally measure the extrinsic angular momentum contribution of topologically structured darkness found within fractional vortex beams, and show that this structured darkness can be explained by evanescent waves at ...
Samuel N. Alperin, M. Siemens
semanticscholar +1 more source
Germination responses to light of four Neotropical forest tree species along an elevational gradient in the southern Central Andes [PDF]
, 2020 Seed germination is a key part of plants' life cycle and is mostly affected by the genetic background, the environmental conditions experienced by the mother plant and the seedbed conditions.
Caron, Maria Mercedes +4 more
core +1 more source
DARKNESS: A Microwave Kinetic Inductance Detector Integral Field Spectrograph for High-contrast Astronomy [PDF]
, 2018 We present DARKNESS (the DARK-speckle Near-infrared Energy-resolving Superconducting Spectrophotometer), the first of several planned integral field spectrographs to use optical/near-infrared Microwave Kinetic Inductance Detectors (MKIDs) for high ...
S. Meeker +23 more
semanticscholar +1 more source
A n Exegetical Analysis of the Darkness of Mu’min and the Light of Kafir in Surah al-Baqarah [PDF]
پژوهشهای تفسیر تطبیقی, 2020 Received: 25/06/2019 | Accepted: 30/08/2019 The 257th verse of Surah al-Baqarah is one of controversial verses in the Quran which mentions “bringing Mu’minin (believers) out from darkness into the light” and “taking Kafirin (disbelievers) out of the ...
Siyid Muhammad Musavi Muqaddam +3 more
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The circadian clock and darkness control natural competence in cyanobacteria
Nature Communications, 2019 The cyanobacterium Synechococcus elongatus is a model organism for the study of circadian rhythms. It is naturally competent for transformation—that is, it takes up DNA from the environment, but the underlying mechanisms are unclear.
A. Taton +6 more
semanticscholar +1 more source
Physics Letters B, 2019 The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared is defined as a function of its equation of state (EoS) parameter. It is shown how logarithmic part of this function results in dynamical regimes previously not observed in ...
Dalibor Perković, Hrvoje Štefančić
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Acta Societatis Botanicorum Poloniae, 2014 The objects of this research were the antheridial filament cells of Chara vulgaris which after 5-day mitodepressing treatment of the darkness reactivated mitosis (without light stimulation) in the result of the physiological state evocing the initiation ...
Maria Kwiatkowska
doaj +1 more source