Results 41 to 50 of about 21,268 (194)

Can Dark Matter be an artifact of extended theories of gravity?

, 2016
In this article, we propose different background models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of genesis of dark matter without affecting the SM particle sector.
Choudhury, Sayantan, Sadhukhan, Soumya, Sen, Manibrata   +2 more
core   +1 more source

Conformal transformations and Nordstr\"om's scalar theory of gravity

, 2010
As we shall briefly recall, Nordstr\"om's theory of gravity is observationally ruled out. It is however an interesting example of non-minimal coupling of matter to gravity and of the role of conformal transformations.
Deruelle, Nathalie, Sasaki, Misao
core   +1 more source

SuperCam Raman Activities at Jezero Crater, Mars: Observational Strategies, Data Processing, and Mineral Detections During the First 1000 Sols

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract The Mars 2020 Perseverance rover introduced Raman spectroscopy to in situ planetary exploration for the first time when it landed in Jezero crater on Mars in February 2021. The SuperCam instrument onboard Perseverance is a multi‐analytical tool capable of acquiring time‐resolved Raman data from Martian targets at standoff distances of a few ...
G. Lopez‐Reyes, J. A. Manrique, E. Clavé, A. Ollila, O. Beyssac, P. Pilleri, S. Bernard, E. Dehouck, M. Veneranda, S. K. Sharma, M. Nachon, J. Aramendia, O. Forni, F. Rull, T. Acosta‐Maeda, A. Brown, S. M. Angel, K. Castro, E. Cloutis, L. Coloma, J. Comellas, D. Delapp, R. Jakubek, S. Julve‐Gonzalez, E. Kelly, J. M. Madariaga, G. Montagnac, I. Poblacion, S. Schröder, S. A. Connell, I. Reyes‐Rodriguez, Z. U. Wolf, S. Maurice, O. Gasnault, S. Clegg, A. Cousin, R. C. Wiens, the SuperCam Raman Working Group and the SuperCam Team   +37 more
wiley   +1 more source

Leptophilic dark matter from gauged lepton number: phenomenology and gravitational wave signatures

Journal of High Energy Physics, 2019
New gauge symmetries often appear in theories beyond the Standard Model. Here we study a model where lepton number is promoted to a gauge symmetry. Anomaly cancellation requires the introduction of additional leptons, the lightest of which is a natural ...
Eric Madge, Pedro Schwaller
doaj   +1 more source

Light dark matter from inflaton decay

Journal of High Energy Physics, 2021
We propose a simple mechanism of light dark matter (DM) production from the decay of the oscillating inflaton condensation. If the reheating temperature after inflation is higher than the inflaton mass, which is of the same order of the momentum of the ...
Takeo Moroi, Wen Yin
doaj   +1 more source

What are the Building Blocks of Our Universe? [PDF]

, 2004
We are told that we are living in a Golden Age of Astronomy. Cosmological Parameters are found with un precedented accuracy. Yet, the known form of matter forms only a small fraction of the total energy density of the universe.
Wali, Kameshwar C.
core   +2 more sources

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

Bosonic Coherent Motions in the Universe [PDF]

, 2014
We mini-review the role of fundamental spin-0 bosons as bosonic coherent motion (BCM) in the Universe. The fundamental spin-0 bosons have the potential to account for the baryon number generation, cold dark matter (CDM) via BCM, dark energy, and ...
Kim, Jihn E., Semertzidis, Yannis, Tsujikawa, Shinji   +2 more
core   +2 more sources

On Babushkas and Postcapitalism: Theorising Diverse Economies from the Global East

Antipode, Volume 57, Issue 6, Page 2484-2507, November 2025.
Abstract As transformative visions for more just and sustainable societies multiply around the globe, the Diverse and Community Economies approach presents one of the most influential strategies to advance postcapitalist visions. In this paper, we contribute to this project based on our research and activism in the Global East, intended here as Central
Lucie Sovová, Ottavia Cima, Petr Jehlička, Lilian Pungas, Markus Sattler, Thomas S.J. Smith, Anja Decker, Nadia Johanisova, Sunna Kovanen, Peter North, on behalf of Polička Collective   +10 more
wiley   +1 more source

Gravitational wave signatures from domain wall and strong first-order phase transitions in a two complex scalar extension of the Standard Model

Journal of High Energy Physics, 2021
We consider a simple extension of Standard Model by adding two complex singlet scalars with a U(1) symmetry. A discrete Z 2 × Z 2 ′ $$ {\mathcal{Z}}_2\times {\mathcal{Z}}_2^{\prime } $$ symmetry is imposed in the model and the added scalars acquire a non
Avik Paul, Upala Mukhopadhyay, Debasish Majumdar   +2 more
doaj   +1 more source