Results 101 to 110 of about 2,716,965 (190)

Minimal Coupling and Attractors

, 2014
The effects of minimally coupling a gravity to matter on a flat Robertson-Walker geometry are explored. Particular attention is paid to the evolution of the symplectic structure and the Liouville measure it defines.
Sloan, David
core   +1 more source

Deriving the Ionospheric Electric Field From the Bulk Motion of Radar Aurora in the E‐Region

Journal of Geophysical Research: Space Physics, Volume 129, Issue 11, November 2024.
Abstract In the auroral E‐region strong electric fields can create an environment characterized by fast plasma drifts. These fields lead to strong Hall currents which trigger small‐scale plasma instabilities that evolve into turbulence. Radio waves transmitted by radars are scattered off of this turbulence, giving rise to the ‘radar aurora’.
Magnus F. Ivarsen, Jean‐Pierre St‐Maurice, Devin R. Huyghebaert, Megan D. Gillies, Frank Lind, Brian Pitzel, Glenn C. Hussey   +6 more
wiley   +1 more source

A systematic study of hidden sector dark matter: application to the gamma-ray and antiproton excesses

Journal of High Energy Physics, 2020
In hidden sector models, dark matter does not directly couple to the particle content of the Standard Model, strongly suppressing rates at direct detection experiments, while still allowing for large signals from annihilation.
Dan Hooper, Rebecca K. Leane, Yu-Dai Tsai, Shalma Wegsman, Samuel J. Witte   +4 more
doaj   +1 more source

Imprints of the Standard Model in the Sky: Gravitational Waves from the decay of the Higgs after inflation [PDF]

arXiv, 2014
The existence of the Standard Model (SM) Higgs implies that a gravitational wave (GW) background is generated by the decay products of the Higgs, soon after the end of inflation. Theoretically, all Yukawa and $SU(2)_L$ gauge couplings of the SM are imprinted as features in the GW spectrum.
arxiv  

The unexpected resurgence of Weyl geometry in late 20-th century physics

, 2017
Weyl's original scale geometry of 1918 ("purely infinitesimal geometry") was withdrawn by its author from physical theorizing in the early 1920s. It had a comeback in the last third of the 20th century in different contexts: scalar tensor theories of ...
A Codello, A Trautman, A Trautman, A Zee, A Zee, A Zee, A. Einstein, A. Trautman, Alexander Bregman, ALI SHOJAI, Ali Shojai, ALI SHOJAI, Allan Franklin, Arianna Borrelli, B. Rievers, Bertram Kostant, C N Yang, C Romero, C. Brans, C. N. Yang, C. ROMERO, Carl Brans, Carl H. Brans, Carlos Castro, Carlos Castro, Carlos Castro, Chen‐Ning Yang, Claus Lämmerzahl, Curtis G Callan, D. J. Simms, David Bohm, David Bohm, David Kaiser, Dennis Lehmkuhl, Detlev Dürr, E. Santamato, E. Santamato, E. Santamato, E. Scholz, Enrico Santamato, Enrico Santamato, Erhard Scholz, Erhard Scholz, F. Dahia, F. Englert, F.W. Hehl, Fang-Fang Yuan, FATIMAH SHOJAI, FATIMAH SHOJAI, FATIMAH SHOJAI, FATIMAH SHOJAI, Francesco De Martini, Francesco De Martini, Francesco De Martini, Friedrich W Hehl, Friedrich W. Hehl, Friedrich W. Hehl, Friedrich W. Hehl, Gerald B. Folland, H P de Oliveira, H Weyl, H.T. Nieh, Helge Kragh, Helge S. Kragh, Herbert Pfister, Hermann Weyl, Hermann Weyl, Hitoshi Nishino, Hrvoje Nikolić, Hubert Goenner, Hung Cheng, J Audretsch, J M Salim, J. A. Schouten, J. Bekenstein, J. M. Charap, Jayant V. Narlikar, Jean-Marie Souriau, John Miritzis, JOHN MIRITZIS, John R. Ray, Jürgen Audretsch, Jürgen Audretsch, Jȩdrzej Śniatycki, K. Hayashi, Koray Karaca, Krzysztof A. Meissner, Lee Smolin, M-A Tonnelat, M. Flato, M. Kasuya, M. L. Pucheu, M. Novello, M. Novello, M. NOVELLO, M. Omote, M. Omote, Marek Pawlowski, Marek Pawłowski, Mark Israelit, Mark Israelit, Mark Israelit, Mark Israelit, Mark Israelit, Martina R. Schneider, Mikhail Shaposhnikov, Mikhail Shaposhnikov, Milutin Blagojević, Moshé Flato, N M J Woodhouse, Nathan Rosen, P. A. M. Dirac, P. A. M. Dirac, P. Bouvier, Peter Gilkey, Philip D. Mannheim, Philip D. Mannheim, Philip D. Mannheim, Philip D. Mannheim, R Utiyama, R Utiyama, R Utiyama, R Utiyama, R. H. Dicke, R. Penrose, Robert Alan Coleman, Robert Foot, S Deser, S Weinberg, Sidney Coleman, Spiros Cotsakis, Stephen L. Adler, T. Padmanabhan, T. W. B. Kibble, Timothy Clifton, V Perlick, V Vizgin, V. Canuto, V. M. Canuto, Volker Perlick, W R Wood, W. Drechsler, W. Drechsler, W. R. Wood, Wayne C. Myrvold, Wojciech Kopczyński, Wolfgang Drechsler, Yu.N. Obukhov, YUE-LIANG WU   +148 more
core   +1 more source

The Thermal Structure and Composition of Jupiter's Great Red Spot From JWST/MIRI

Journal of Geophysical Research: Planets, Volume 129, Issue 10, October 2024.
Abstract Jupiter's Great Red Spot (GRS) was mapped by the James Webb Space Telescope (JWST)/Mid‐Infrared Instrument (4.9–27.9 μ ${\upmu }$m) in July and August 2022. These observations took place alongside a suite of visual and infrared observations from; Hubble, JWST/NIRCam, Very Large Telescope/VISIR and amateur observers which provided both spatial ...
Jake Harkett, Leigh N. Fletcher, Oliver R. T. King, Michael T. Roman, Henrik Melin, Heidi B. Hammel, Ricardo Hueso, Agustín Sánchez‐Lavega, Michael H. Wong, Stefanie N. Milam, Glenn S. Orton, Katherine de Kleer, Patrick G. J. Irwin, Imke de Pater, Thierry Fouchet, Pablo Rodríguez‐Ovalle, Patrick M. Fry, Mark R. Showalter   +17 more
wiley   +1 more source

Global fits of the scalar singlet model using GAMBIT [PDF]

arXiv, 2017
The extension of the standard model (SM) by a Higgs portal scalar field is one the simplest dark matter theories. We present here the first results for a global fit to this model using the global and beyond the SM inference tool (GAMBIT). This software enables the combination of dark matter constraints in a statistically consistent manner.
arxiv  

Likely Ferromagnetic Minerals Identified by the Perseverance Rover and Implications for Future Paleomagnetic Analyses of Returned Martian Samples

Journal of Geophysical Research: Planets, Volume 129, Issue 9, September 2024.
Abstract Although Mars today does not have a core dynamo, magnetizations in the Martian crust and in meteorites suggest a magnetic field was present prior to 3.7 billion years (Ga) ago. However, the lack of ancient, oriented Martian bedrock samples available on Earth has prevented accurate estimates of the dynamo's intensity, lifetime, and direction ...
Elias N. Mansbach, Tanya V. Kizovski, Eva L. Scheller, Tanja Bosak, Lucia Mandon, Briony Horgan, Roger C. Wiens, Christopher D. K. Herd, Sunanda Sharma, Jeffrey R. Johnson, Travis S. J. Gabriel, Olivier Forni, Yang Liu, Mariek E. Schmidt, Benjamin P. Weiss   +14 more
wiley   +1 more source

Non-perturbative reheating and Nnaturalness

Journal of High Energy Physics, 2017
We study models in which reheating happens only through non-perturbative processes. The energy transferred can be exponentially suppressed unless the inflaton is coupled to a particle with a parametrically small mass. Additionally, in some models a light
Edward Hardy
doaj   +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