Results 21 to 30 of about 1,544,264 (173)

Generalized Parton Distributions for the Nucleon in Chiral Perturbation Theory. [PDF]

, 2006
We complete the analysis of twist-two generalized parton distributions of the nucleon in one-loop order of heavy-baryon chiral perturbation theory.
Diehl, M., M. Diehl, A. Schäfer, Manashov, A., A. Manashov, Schäfer, A.   +5 more
core   +1 more source

A Nakanishi-based model illustrating the covariant extension of the pion GPD overlap representation and its ambiguities

Physics Letters B, 2018
A systematic approach for the model building of Generalized Parton Distributions (GPDs), based on their overlap representation within the DGLAP kinematic region and a further covariant extension to the ERBL one, is applied to the valence-quark pion's ...
N. Chouika, C. Mezrag, H. Moutarde, J. Rodríguez-Quintero   +3 more
doaj   +1 more source

Key Drivers of Soil CO2, CH4, and N2O Fluxes in Conifer and Broadleaf Afforestation Systems in the Southeastern U.S.: A Machine Learning Analysis

Global Change Biology Communications, Volume 1, Issue 3, September 2026.
Soil CO2 and CH4 emissions were higher in broadleaf than conifer afforestation systems in the southeastern U.S., particularly during the growing season. Machine learning analyses identified soil temperature, moisture, and atmospheric conditions as key drivers, emphasizing that soil greenhouse gas responses critically influence the climate mitigation ...
Jianing Liang, Austin Himes, Cade Booth, Troy Bowman, Olivia Buchanan, Gregory Bushey, Grethel Capistran, Sidnee Everhart, Natalie Dearing, Shaik Hossain, Joshua Granger, Samantha Humphrey, Dawn Lemke, Mark McConnell, Adam Polinko, Rebecca Pope, Krishna Poudel, Logan Pruitt, Nasir Qadir, Heidi Renninger, Morné le Roux, Kris Shelby, Jeremy Whigham, Jia Yang, Courtney Siegert   +24 more
wiley   +1 more source

Parton distributions [PDF]

, 2004
Parton distributions, α(χ,μ(^₂) are essential ingredients for almost all theoretical calculations at hadron colliders. They give the number densities of the colliding par- tons (quarks and gluons) inside their parent hadrons at a given momentum fraction ...
Watt, Graeme
core  

Photon Generalized Parton Distributions

, 2011
We present a calculation of the generalized parton distributions of the photon using overlaps of photon light-front wave ...
MUKHERJEE, A, Asmita Mukherjee, Sreeraj Nair, NAIR, S   +3 more
core   +1 more source

The Kaon Off-Shell Generalized Parton Distributions and Transverse Momentum Dependent Parton Distributions

Particles
We investigate the off-shell generalized parton distributions (GPDs) and transverse momentum dependent parton distributions (TMDs) of kaons within the framework of the Nambu–Jona-Lasinio model, employing proper time regularization.
Jin-Li Zhang
doaj   +1 more source

Generalized TMDs and the exclusive double Drell–Yan process

Physics Letters B, 2017
Generalized transverse momentum dependent parton distributions (GTMDs) are the most general parton correlation functions of hadrons. By considering the exclusive double Drell–Yan process it is shown for the first time how quark GTMDs can be measured ...
Shohini Bhattacharya, Andreas Metz, Jian Zhou   +2 more
doaj   +1 more source

Generalized parton distributions through universal moment parameterization: zero skewness case

Journal of High Energy Physics, 2022
We present a global analysis program for the generalized parton distributions (GPDs) based on conformal moment expansion. We apply the strategy of universal moment parameterization to fit both the collinear parton distribution functions (PDFs) from ...
Yuxun Guo, Xiangdong Ji, Kyle Shiells
doaj   +1 more source

Transformer‐Based Digital Soil Mapping Reveals Land‐Use Legacy Effects on (Sub)Tropical Soil Carbon

Earth's Future, Volume 14, Issue 9, September 2026.
Abstract Tropical and subtropical soils store approximately one‐third of global soil organic carbon (SOC) despite covering less than one‐quarter of terrestrial surfaces, yet accurate spatiotemporal prediction methods remain inadequate. We present the first application of transformer architectures to multi‐temporal Landsat observations for SOC ...
Hayley Peter‐Contesse, Aron Boettcher, Susan E. Crow, Sabine Grunwald   +3 more
wiley   +1 more source

Assimilation of Atmospheric CO2 Concentration in the ORCHIDEE Land Surface Model: Exploring the Added Value of Explicit Forest Regrowth Representation

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 9, September 2026.
Abstract The land absorbs a large proportion of human‐induced carbon emissions, yet the spatial distribution of this carbon sink remains uncertain. Land surface models (LSMs) and atmospheric inversions often diverge on the spatial distribution of carbon sink, with models generally underestimating the northern land sink (above 30°N).
Simon Beylat, Philippe Peylin, Nina Raoult, Michael O’Sullivan, Antoine Berchet, Frederic Chevallier, Peter J. Rayner   +6 more
wiley   +1 more source