Results 71 to 80 of about 177,126,089 (182)

Geochemical investigation of impactites from the Boltysh impact structure and possible relationship to early Danian sediments from the Umbria–Marche Basin, Italy

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 7, Page 1309-1332, July 2026.
Abstract Within the Danian Scaglia Rossa Formation appears a regionally correlatable horizon cutting across multiple sections and outcrops within the Umbria–Marche Basin of NE Italy, where it is intercalated with uniform pelagic carbonate successions. This horizon is called “ALE layer” and has tentatively been interpreted as a fine‐grained volcanic ash.
Toni Schulz   +5 more
wiley   +1 more source

Cosmological Probes of Physics Beyond the Standard Model [PDF]

open access: yes, 2020
The Standard Model (SM) of particle physics can explain a diverse variety of experimental observations. However, there remain multiple compelling reasons why we believe that the SM is not the final theory of the universe. In this thesis, we first briefly
Kumar, Soubhik
core   +1 more source

Light dark Higgs boson in minimal sub-GeV dark matter scenarios

open access: yesJournal of High Energy Physics, 2018
Minimal scenarios with light (sub-GeV) dark matter whose relic density is obtained from thermal freeze-out must include new light mediators. In particular, a very well-motivated case is that of a new “dark” massive vector gauge boson mediator.
Luc Darmé   +2 more
doaj   +1 more source

Predictions for axion couplings from ALP cogenesis

open access: yesJournal of High Energy Physics, 2021
Adding an axion-like particle (ALP) to the Standard Model, with a field velocity in the early universe, simultaneously explains the observed baryon and dark matter densities.
Raymond T. Co   +2 more
doaj   +1 more source

Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance

open access: yesAdvanced Materials Interfaces, Volume 13, Issue 11, 9 June 2026.
Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad   +3 more
wiley   +1 more source

The fundamental arrow of time in classical cosmology [PDF]

open access: yes, 2012
The aim of this paper is to show that a new understanding of fundamentality (section 2), can be applied successfully in classical cosmology and is able to improve a fundamental understanding of cosmological time asymmetries. In the introduction (section
Wohlfarth, Daniel
core  

Some trends in the philosophy of physics [PDF]

open access: yes, 2011
A short review of some recent developments in the philosophy of physics is presented. I focus on themes which illustrate relations and points of common interest between philosophy of physics and three of its 'neighboring' fields: Physics, metaphysics and
Zinkernagel, Henrik   +2 more
core   +1 more source

Multipartite dark matter with scalars, fermions and signatures at LHC

open access: yesJournal of High Energy Physics, 2019
Basic idea of this analysis is to achieve a two-component dark matter (DM) framework composed of a scalar and a fermion, with non-negligible DM-DM interaction contributing to thermal freeze out (hence relic density), but hiding them from direct detection
Subhaditya Bhattacharya   +2 more
doaj   +1 more source

Background Instability of Quintessence Model in Light of Entropy and Distance Conjecture

open access: yesFortschritte der Physik, Volume 74, Issue 6, June 2026.
ABSTRACT We apply the covariant entropy bound argument supporting the de Sitter swampland conjecture to the quintessence model, to find out the condition for the background to be unstable. More concretely, the background is unstable when the matter entropy given by the species number of the effective field theory increases more rapidly than the ...
Min‐Seok Seo
wiley   +1 more source

Anthropic reasoning in multiverse cosmology and string theory [PDF]

open access: yes, 2005
Anthropic arguments in multiverse cosmology and string theory rely on the weak anthropic principle (WAP). We show that the principle, though ultimately a tautology, is nevertheless ambiguous.
Weinstein, Steven, Steven Weinstein
core  

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