Results 81 to 90 of about 110,473 (324)

Scalar field fluctuations and the production of dark matter

Journal of Cosmology and Astroparticle Physics
Abstract One of the simplest possible candidates for dark matter is a stable scalar singlet beyond the Standard Model. If its mass is below the Hubble scale during inflation, long-wavelength modes of this scalar will be excited during inflation, and their subsequent evolution may lead to the correct relic density of dark matter.
Marcos A.G. Garcia, Wenqi Ke, Yann Mambrini, Keith A. Olive, Sarunas Verner   +4 more
openaire   +2 more sources

Functional Connectivity Linked to Cognitive Recovery After Minor Stroke

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Patients with minor stroke exhibit slowed processing speed and generalized alterations in functional connectivity involving frontoparietal cortex (FPC). The pattern of connectivity evolves over time. In this study, we examine the relationship of functional connectivity patterns to cognitive performance, to determine ...
Vrishab Commuri, Isabella Dallasta, Ciaran Stone, Sophia Girgenti, Neda Gould, Rafael H. Llinas, Jonathan Z. Simon, Elisabeth Breese Marsh   +7 more
wiley   +1 more source

One-loop quantum corrections to cosmological scalar field potentials

, 2007
We study the loop corrections to potentials of complex or coupled real scalar fields used in cosmology to account for dark energy, dark matter or dark fluid.
Alexandre Arbey, Farvah Mahmoudi, M. E. Peskin, T.-P. Cheng   +3 more
core   +1 more source

Differentiation Treatment Applied to Lung Cancer Model Reduces Pathogenic Traits in Vitro

Advanced Biology, EarlyView.
Non‐small cell lung cancer cells (A549) treated with a differentiation medium showed strong reduction in proliferation, migration, clonogenicity, spheroid formation and stemness markers, with enhanced adhesion properties and alveolar features, all pointing to a notably less aggressive phenotype in support of differentiation therapy as a promising ...
Alice Grossi, Paola Fulghieri, Abdurakhmon Aduvaliev, Karen Soffiantini, Irene Oldrati, Margherita Cavallo, Marco Biggiogera, Giorgia Pellavio, Umberto Laforenza, Monica Savio, Virginie Sottile   +10 more
wiley   +1 more source

Connecting low scale seesaw for neutrino mass to inelastic sub-GeV dark matter with Abelian gauge symmetry

Nuclear Physics B, 2021
Motivated by the recently reported excess of electron recoil events by the XENON1T experiment, we propose low scale seesaw scenarios for light neutrino masses within U(1)X gauge extension of the standard model that also predicts stable as well as long ...
Debasish Borah, Satyabrata Mahapatra, Narendra Sahu   +2 more
doaj   +1 more source

Sub-horizon Perturbation Behavior in Extended Quintessence

, 2002
In the general context of scalar-tensor theories, we consider a model in which a scalar field coupled to the Ricci scalar in the gravitational sector of the Lagrangian, is also playing the role of an ``Extended Quintessence'' field, dominating the energy
Amendola, Arbey, Baccigalupi, Bartolo, Borriello, C. Baccigalupi, Carroll, Chiba, Chiba, Esposito-Farese, F. Perrotta, Faraoni, Flores, Guzman, Hu, Lokas, Matos, Moore, Padmanabhan, Perlmutter, Perrotta, Perrotta, Riazuelo, Riazuelo, Riess, Riess, Torres, Uzan, Wetterich   +28 more
core   +2 more sources

Numerical Model and Experimental Validation of Composite Metal Foam in Protecting Carbon Steel Against Puncture

Advanced Engineering Materials, EarlyView.
The puncture prevention and energy absorption performance of composite metal foam (CMF) are studied experimentally and numerically for hazardous materials transportation protection. The numerical model implementing air within the CMF (nonhomogeneous model using fluid cavity technique) predicts puncture more accurately compared to the homogeneous CMF ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

Interacting scalar fields: Dark matter and early dark energy

Physical Review D
The main aim of this work is to explore the possibility that cold dark matter (CDM) and early dark energy (EDE) can be described by canonical scalar fields that are coupled at the level of its conservation equations. The formalism covers dynamical aspects at the background and linear perturbation levels for an arbitrary coupling function, followed by ...
Gabriela Garcia-Arroyo, L. Arturo Ureña-López, J. Alberto Vázquez   +2 more
openaire   +2 more sources

Production of Metallic Foam Precursors Using Current‐Activated Pressure‐Assisted Densification

Advanced Engineering Materials, EarlyView.
A powder compaction metallurgical method, known as current‐activated pressure‐assisted densification, is applied to enhance the compaction of metal foam precursors. This method improves precursor quality by achieving higher density, lower electrical resistivity, and more uniform pore nucleation in the resulting foams, reducing energy consumption and ...
Tillmann Robert Neu, Paul Hans Kamm, Francisco García‐Moreno   +2 more
wiley   +1 more source

Neutrino masses and mixed dark matter from doublet and singlet scalars

Journal of High Energy Physics
We consider the extension of the Standard Model with an inert scalar doublet, three right-handed neutrinos, and singlet scalar fields, φ and S. In this model, neutrino masses are zero in the limit of the unbroken Z 4 discrete symmetry.
Jongkuk Kim, Seong-Sik Kim, Hyun Min Lee, Rojalin Padhan   +3 more
doaj   +1 more source