Results 91 to 100 of about 21,268 (194)

Inert scalar dark matter in an extra dimension inspired model

, 2014
In this paper we analyze a dark matter model inspired by theories with extra dimensions. The dark matter candidate corresponds to the first Kaluza-Klein mode of a real scalar added to the Standard Model.
Lineros, R. A., Santos, F. A. Pereira dos   +1 more
core   +1 more source

Oued Chebeika 002: A new CI1 meteorite linked to outer solar system bodies

Meteoritics &Planetary Science, Volume 60, Issue 7, Page 1441-1479, July 2025.
Abstract CI1 chondrites are rare meteorites with high scientific value. In fact, they are the most chemically primitive meteorites and show evidence of intense parent‐body aqueous alteration. They also share strong similarities with samples from Ryugu and Bennu asteroids returned by the JAXA Hayabusa2 and NASA's OSIRIS‐REx missions.
J. Gattacceca, M. Gounelle, B. Devouard, J.‐A. Barrat, L. Bonal, A. J. King, C. Maurel, P. Beck, M. Roskosz, J.‐C. Viennet, D. Mukherjee, N. Dauphas, P. R. Heck, T. Yokoyama, K. López García, O. Poch, O. Grauby, C. S. Harrison, V. Vinogradoff, P. Vernazza, S. Tikoo, V. Vidal, P. Rochette, D. AuYang, D. Borschneck, J. Juraszek, B. Clark   +26 more
wiley   +1 more source

Extended Scenarios for Solar Radio Emissions With Downshifted Electron Beam Plasma Excitations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract First‐principle studies of radiative processes aimed at explaining the origin of type II and type III solar radio bursts raise questions on the implications of downshifted electron beam plasma excitations with frequency (slightly) below the plasma frequency ω≲ωpe $\left(\omega \lesssim {\omega }_{pe}\right)$ in the generation of radio ...
M. Lazar, R. A. López, S. M. Shaaban, S. Poedts, H. Fichtner   +4 more
wiley   +1 more source

String Theory: A Framework for Quantum Gravity and Various Applications [PDF]

, 2008
In this semi-technical review we discuss string theory (and all that goes by that name) as a framework for a quantum theory of gravity. This is a new paradigm in theoretical physics that goes beyond relativistic quantum field theory.
Wadia, Spenta R.
core   +1 more source

The Flavor of Cosmology

, 2018
We discuss the cosmology of models in which the standard model Yukawa couplings depend on scalar field(s), often referred to as flavons. We find that thermal corrections of the flavon potential tend to decrease the Yukawa couplings, providing an ...
Lillard, Benjamin, Ratz, Michael, Tait, Tim M. P., Trojanowski, Sebastian   +3 more
core   +1 more source

Core‐Halo Correlations of Solar Wind Electrons and Temperature Anisotropy Instabilities

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract The properties of electrons in the heliospheric plasma are modulated by various factors, starting with the expansion and bimodal nature of the slow or fast solar wind, and continuing with the kinetic mechanisms of acceleration and energy exchange with small‐scale plasma waves.
S. M. Shaaban, S. Kennis, M. Lazar, V. Pierrard, S. Poedts   +4 more
wiley   +1 more source

QCD axion dark matter from a late time phase transition

Journal of High Energy Physics, 2020
We investigate the possibility that the Peccei-Quinn phase transition occurs at a temperature far below the symmetry breaking scale. Low phase transition temperatures are typical in supersymmetric theories, where symmetry breaking fields have small ...
Keisuke Harigaya, Jacob M. Leedom
doaj   +1 more source

Reconnection Onset in Overstretched Thin Current Sheets: PIC Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract Onset of reconnection in the magnetotail requires its current sheet (CS) to thin down to the thermal ion gyroradius (or thinner) to demagnetize ions (or even electrons) and to provide their Landau dissipation. However, in isotropic plasma models of the tail the ion‐scale CSs inflate too rapidly with the distance from Earth to remain ion‐scale ...
M. I. Sitnov, H. Arnold
wiley   +1 more source

Moduli Stabilization in String Gas Cosmology

, 2005
String gas cosmology is an approach towards studying the effects of superstring theory on early universe cosmology which is based on new symmetries and new degrees of freedom of string theory.
Brandenberger, Robert H.
core   +1 more source

New type of string solutions with long range forces

Journal of High Energy Physics, 2020
We explore the formation and the evolution of the string network in the Abelian Higgs model with two complex scalar fields. A special feature of the model is that it possesses a global U(1) symmetry in addition to the U(1) gauge symmetry. Both symmetries
Takashi Hiramatsu, Masahiro Ibe, Motoo Suzuki   +2 more
doaj   +1 more source