Results 71 to 80 of about 17,379 (194)
From D s → γ in lattice QCD to B s → μμγ at high q 2
Journal of High Energy Physics, 2023 We use a recent lattice determination of the vector and axial D s → γ form factors at high squared momentum transfer q 2 to infer their B s → γ counterparts. To this end, we introduce a phenomenological approach summarized as follows.
Diego Guadagnoli +3 more
doaj +1 more source
In-Medium Nucleon Electromagnetic Form Factors in Vector Meson Dominance Model [PDF]
, 2004 We study medium modifications of the nucleon electromagnetic form factors in the vector meson dominance model. The in-medium vector meson masses are taken from a chiral SU(3) model. We find that the electric and magnetic form factors of the bound nucleon
Wen-Fang Chen, D. Lu
semanticscholar +1 more source
American Journal of Botany, Volume 113, Issue 1, January 2026.Abstract Premise Evolutionary theory predicts polymorphism should be rare; however, intraspecific variation in floral color is common and can be attributed to genetic drift, plasticity, or variable selection. Examining floral color polymorphism both within contact zones and across a species' range can reveal the mechanisms maintaining this variation ...
Emma Fetterly +6 more
wiley +1 more source
Direct X(3872) production in e+e− collisions
Physics Letters B, 2014 Direct production of the charmonium-like state X(3872) in e+e− collisions is considered in the framework of the vector meson dominance model. An order-of-magnitude estimate for the width Γ(X→e+e−) is found to be ≳0.03 eV. The same approach applied to the
Achim Denig +3 more
doaj +1 more source
Vector meson dominance and the ° transition form factor [PDF]
, 2010 It is shown that the {pi}{sup 0} transition form factor F(Q{sub 1}{sup 2},Q{sub 2}{sup 2}) differs substantially from its one-real-photon limit F(Q{sub 1}{sup 2},0) even for rather small values of Q{sub 2}{sup 2} ({approx_equal}0.1 GeV{sup 2}), which ...
P. Lichard
semanticscholar +1 more source
Ecology and Evolution, Volume 16, Issue 1, January 2026.We explore evolutionary changes in Crassulacean acid metabolism (CAM) and associated traits during the diversification of Aichryson (Crassulaceae) across the Macaronesian Islands. By combining field data, physiological measurements and phylogenetic analysis, we identify shifts in photosynthetic strategy linked to habitat transitions.
Jessica A. Berasategui +5 more
wiley +1 more source
Electromagnetic form factors of nucleons in the extended vector meson dominance model [PDF]
, 2009 The extended vector meson dominance model, which allows one to describe the electromagnetic form factors of nucleons obeying the asymptotic quark counting rule prescriptions and contains the minimal number of free parameters, is presented.
A. Faessler +2 more
semanticscholar +1 more source
Leveraging Long‐Term Ecological Research Initiatives Into the One Health Synthesis
Ecology and Evolution, Volume 16, Issue 1, January 2026.We address important ecological and evolutionary considerations for advancing a One Health perspective by drawing attention to faunal and ecosystem changes occurring through the Great Plains of North America that have strong implications for future risk of emerging pathogens including zoonoses.
Andrew G. Hope +2 more
wiley +1 more source
The “regime shift extinctions” hypothesis and mass extinction of waterbirds in Hawaiʻi
Ecosphere, Volume 17, Issue 1, January 2026.Abstract Studies of biodiversity loss commonly imply that species extinctions occurred as a direct result of initial human arrival and thus are attributable to stewardship failures of Indigenous Peoples. However, recent studies have suggested this assumption is not supported by the evidence, prompting a global reevaluation of existing assumptions.
Kristen C. Harmon +2 more
wiley +1 more source
Unveiling biases in water sampling: A Bayesian approach for precision in edge‐of‐field monitoring
Journal of Environmental Quality, Volume 55, Issue 1, January/February 2026.Abstract Edge‐of‐field (EoF) water sampling methods play a crucial role in understanding non‐point source nutrient fate and its environmental impacts, yet accurately interpreting water quality studies, remains challenging. This study evaluates and compares four EoF runoff water sampling techniques: (1) a commercial automated sampler (ISCO) with hourly ...
Ansley J. Brown +4 more
wiley +1 more source