Results 31 to 40 of about 363,778 (266)

Symmetron Dark Energy in Laboratory Experiments

Physical Review Letters, 2013
The symmetron scalar field is a matter-coupled dark energy candidate which effectively decouples from matter in high-density regions through a symmetry restoration. We consider a previously unexplored regime, in which the vacuum mass $μ\sim 2.4\times 10^{-3}$ eV of the symmetron is near the dark energy scale, and the matter coupling parameter $M \sim 1$
openaire   +4 more sources

Electroweak symmetric dark matter balls

Journal of High Energy Physics, 2019
In the simple Higgs-portal dark matter model with a conserved dark matter number, we show that there exists a non-topological soliton state of dark matter.
Eduardo Pontón, Yang Bai, Bithika Jain
doaj   +1 more source

Calibration Monitor for Dark Energy Experiments [PDF]

, 2009
The goal of this program was to design, build, test, and characterize a flight qualified calibration source and monitor for a Dark Energy related experiment: ACCESS - 'Absolute Color Calibration Experiment for Standard Stars'. This calibration source, the On-board Calibration Monitor (OCM), is a key component of our ACCESS spectrophotometric ...
openaire   +2 more sources

New constraints on coupled dark energy from the Planck satellite experiment [PDF]

Physical Review D, 2013
We present new constraints on coupled dark energy from the recent measurements of the cosmic microwave background anisotropies from the Planck satellite mission. We found that a coupled dark energy model is fully compatible with the Planck measurements, deriving a weak bound on the dark matter-dark energy coupling parameter xi = -0.49(-0.31)(+0.19) at ...
Salvatelli, V., Marchini, A, Lopez Honorez, Laura, Mena, Olga   +3 more
openaire   +5 more sources

TESTING THE DARK-ENERGY-DOMINATED COSMOLOGY BY THE SOLAR-SYSTEM EXPERIMENTS [PDF]

The Eleventh Marcel Grossmann Meeting, 2008
According to the recent astronomical data, the most part of energy in the Universe is in the 'dark' form, which is effectively described by Lambda-term in Einstein equations. All arguments in favor of the dark energy were obtained so far from the observational data related to very large (intergalactic) scales.
openaire   +2 more sources

The GAPS experiment to search for dark matter using low-energy antimatter [PDF]

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017), 2017
The GAPS experiment is designed to carry out a sensitive dark matter search by measuring low-energy cosmic ray antideuterons and antiprotons. GAPS will provide a new avenue to access a wide range of dark matter models and masses that is complementary to direct detection techniques, collider experiments and other indirect detection techniques.
Ong, R. A., Aramaki, T., Bird, R., Boezio, M., Boggs, S. E., Carr, R., Craig, W. W., Von Doetinchem, P., Fabris, L., Gahbauer, F., Gerrity, C., Fuke, H., Hailey, C. J., Kato, C., Kawachi, A., Kozai, M., Mognet, S. I., Munakata, K., Okazaki, S., Osteria, G., Perez, K., Re, Valerio, Rogers, F., Saffold, N., Shimizu, Y., Yoshida, A., Yoshida, T., Zampa, G., Zweerink, J.   +28 more
openaire   +4 more sources

Relic abundance of dark photon dark matter

Physics Letters B, 2020
We present a new mechanism for producing the correct relic abundance of dark photon dark matter over a wide range of its mass, extending down to 10−20eV. The dark matter abundance is initially stored in an axion which is misaligned from its minimum. When
Prateek Agrawal, Naoya Kitajima, Matthew Reece, Toyokazu Sekiguchi, Fuminobu Takahashi   +4 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Forecasting dark showers at Belle II

Journal of High Energy Physics, 2022
Dark showers from strongly interacting dark sectors that confine at the GeV scale can give rise to novel signatures at e + e − colliders. In this work, we study the sensitivity of B factory experiments to dark showers produced through an effective ...
Elias Bernreuther, Kai Böse, Torben Ferber, Christopher Hearty, Felix Kahlhoefer, Alessandro Morandini, Kai Schmidt-Hoberg   +6 more
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source