Results 81 to 90 of about 17,379 (194)

Baryonic dark forces in electron-beam fixed-target experiments

Journal of High Energy Physics
New GeV-scale dark forces coupling predominantly to quarks offer novel signatures that can be produced directly and searched for at high-luminosity colliders. We compute the photon-proton and electron-proton cross sections for producing a GeV-scale gauge
Safa Ben Othman, Armita Jalooli, Sean Tulin   +2 more
doaj   +1 more source

Photon structure functions at small x in holographic QCD

Physics Letters B, 2015
We investigate the photon structure functions at small Bjorken variable x in the framework of the holographic QCD, assuming dominance of the Pomeron exchange. The quasi-real photon structure functions are expressed as convolution of the Brower–Polchinski–
Akira Watanabe, Hsiang-nan Li
doaj   +1 more source

Realizing vector meson dominance with transverse charge densities [PDF]

, 2011
The transverse charge density in a fast-moving nucleon is represented as a dispersion integral of the imaginary part of the Dirac form factor in the timelike region (spectral function). At a given transverse distance b the integration effectively extends
G. Miller, M. Strikman, C. Weiss
semanticscholar   +1 more source

Inocybe alboaurantiaca (Inocybaceae), a new species from Asia

Nordic Journal of Botany, Volume 2026, Issue 1, January 2026.
A new Inocybe (Inocybaceae) species, Inocybe alboaurantiaca, is described and illustrated from Asia (Japan and Pakistan), based on morphological and phylogenetic analyses of the nrITS and nrLSU regions. Phylogenetically, the most closely related sequences belong to the current mainstream European concept of Inocybe fibrosa.
Sana, Munazza Kiran, Shin Okabe, Khalid Hafazallah, Palvisha Javeed, Wajid Ali   +5 more
wiley   +1 more source

Vector meson production, pion photoproduction, and vector meson dominance

Nuclear Physics B, 1971
Abstract The vector meson dominance hypothesis can be formulated covariantly in terms of invariant amplitudes. This method, which has been successfully used to predict π−p→ϱon from pion photoproduction, is extended to include ω production and charged ϱ production. With the introduction of only two further parameters to describe the mass dependence of
openaire   +1 more source

Hydrochorous Dispersal of Diaspores in a Reconnected Floodplain: Distribution Patterns and Potential for the Development of Floodplain Habitats

Applied Vegetation Science, Volume 29, Issue 1, January/March 2026.
Dike relocation reconnected a section of the Elbe River to its floodplain, thereby restoring a more natural flooding regime, and hydrochorous dispersal of diaspores. Low areas received the most abundant and diverse diaspore deposition, which was dominated by herbaceous species characteristic of open floodplain habitats.
Sebastian Schäfer, Anikó Pusztazeri, Gert Rosenthal   +2 more
wiley   +1 more source

Coordinate-space calculation of QED corrections to the hadronic vacuum polarization contribution to (g − 2)μ with SU(3) flavor symmetry [PDF]

EPJ Web of Conferences
Lattice QCD (LQCD) has proven to be an important tool in understanding the tension between the experimental value for the anomalous magnetic moment of the muon (g − 2)μ and its prediction from the standard model.
Chao En-Hung, Meyer Harvey B., Parrino Julian   +2 more
doaj   +1 more source

The Miners of South America: Impacts of Climate Change on the Distribution of Geositta Miners Along Elevational Gradients

Biotropica, Volume 58, Issue 1, January 2026.
We modeled the current and future distributions of seven Geositta species along elevational gradients in South America under two climate change scenarios. Our results show that most species are projected to lose suitable habitats, particularly under the high‐emission scenario, with distinct responses between lowland and highland taxa.
Ricardo C. Meireles, Leonardo E. Lopes, Gustavo R. Brito, Ricardo Solar   +3 more
wiley   +1 more source

First extraction of the $$\phi $$ ϕ - $$^{4}\textrm{He}$$ 4 He scattering length from near-threshold $$\phi $$ ϕ photoproduction on helium-4

European Physical Journal C: Particles and Fields
We present a model-independent extraction of the $$\phi $$ ϕ – $$^{4}\textrm{He}$$ 4 He scattering length from near-threshold $$\phi $$ ϕ photoproduction on helium-4, based on LEPS Collaboration data for the coherent process $$\gamma + {}^{4}\textrm{He} \
Chengdong Han, Wei Kou, Rong Wang, Xurong Chen   +3 more
doaj   +1 more source

Phenological Variation and Evolution Across Space and Time in the Scarlet Monkeyflower (Erythranthe cardinalis)

Ecology and Evolution, Volume 15, Issue 12, December 2025.
Climate change is altering ecological dynamics, particularly in species with latitudinal range variation. This study investigates how the scarlet monkeyflower's flowering phenology has evolved in response to recent droughts in California. We find that southern populations are flowering later and larger, while northern populations flower earlier and ...
Jordan Waits, Nathanael Larson, M. C. Moazed, Ashley Regan, Marissa Strebler, Lluvia Flores‐Rentería   +5 more
wiley   +1 more source