Results 91 to 100 of about 2,367,094 (272)

Massive Gravity

open access: yesLiving Reviews in Relativity, 2014
We review recent progress in massive gravity. We start by showing how different theories of massive gravity emerge from a higher-dimensional theory of general relativity, leading to the Dvali–Gabadadze–Porrati model (DGP), cascading gravity, and ghost ...
Claudia de Rham
doaj   +1 more source

Dark top partner

open access: yesJournal of High Energy Physics, 2023
Composite Higgs models with extended symmetries can feature mesonic dark matter candidates. In fundamental CHMs, the origin of dark parity can be explained in the UV theory.
Haiying Cai, Giacomo Cacciapaglia
doaj   +1 more source

Electric Field‐Dependent Conductivity as Probe for Charge Carrier Delocalization and Morphology in Organic Semiconductors

open access: yesAdvanced Functional Materials, EarlyView.
Applying a high electric field to a doped organic semiconductor heats up the charge carrier distribution beyond the lattice temperature, enhancing conductivity. It is shown that the associated effective temperature can be used to extract the effective localization length, which is a characteristic length scale of charge transport and provides ...
Morteza Shokrani   +4 more
wiley   +1 more source

GPDs at non-zero skewness in ADS/QCD model

open access: yesPhysics Letters B, 2017
We study Generalized Parton Distribution functions (GPDs) usually measured in hard exclusive processes and encoding information on the three dimensional partonic structure of hadrons and their spin decomposition, for non-zero skewness within the AdS/QCD ...
Matteo Rinaldi
doaj   +1 more source

Out of equilibrium dynamics in spin-glasses and other glassy systems

open access: yes, 1997
We review recent theoretical progress on glassy dynamics, with special emphasis on the importance and universality of the ``aging regime'', which is relevant to many experimental situations.
Bouchaud, Jean-Philippe   +3 more
core   +1 more source

Higgs-mediated leptonic decays of B_s and B_d mesons as probes of supersymmetry [PDF]

open access: yes, 2002
If tan(beta) is large, down-type quark mass matrices and Yukawa couplings cannot be simultaneously diagonalized, and flavour violating couplings of the neutral Higgs bosons are induced at the 1-loop level.
A. Chamseddine   +80 more
core   +2 more sources

Phenomenological aspects of heterotic orbifold models at one loop [PDF]

open access: yes, 2003
We provide a detailed study of the phenomenology of orbifold compactifications of the heterotic string within the context of supergravity effective theories.
P. Binétruy   +3 more
semanticscholar   +1 more source

High Charge Carrier Mobility in Non‐Conjugated 3D Covalent Organic Frameworks

open access: yesAdvanced Materials, EarlyView.
A non‐conjugated 3D COF constructed via boronate ester linkages from tetraphenylene and pyrene‐based monomers is reported, which exhibits a high charge carrier mobility of 14 ± 1 cm2 V−1 s−1. ABSTRACT π‐Conjugation, π–π stacking, and long‐range order play a central role in determining charge transport efficiency in organic materials.
Joaquín Almarza   +11 more
wiley   +1 more source

Scenario of Inflationary Cosmology from the Phenomenological Λ Models [PDF]

open access: yes, 2007
Choosing the three phenomenological models of the dynamical cosmological term Λ, viz., $\Lambda \sim (\dot{a}/a)^{2}$ , $\Lambda \sim {\ddot{a}/a}$ and Λ∼ρ where a is the cosmic scale factor, it has been shown by the method of numerical analysis for ...
Saibal Ray   +5 more
semanticscholar   +1 more source

Performance Constraints of All‐Perovskite Tandem Solar Cells in Low‐Intensity, Low‐Temperature Environments

open access: yesAdvanced Materials, EarlyView.
All‐perovskite tandem solar cells are evaluated under low‐intensity and low‐temperature (LILT) conditions relevant to space environments. Distinct loss regimes emerge, where weaker entropic mixing causes halide segragation below ≈240 K going along with a strong current imbalance, while poor electron transport in C60 dominates.
Sercan Ozen   +10 more
wiley   +1 more source

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