Results 71 to 80 of about 76,116 (260)

Can $\overline{MS}$ parton distributions be negative?

SciPost Physics Proceedings, 2022
We review our recent paper, where we proved Parton distributions functions (PDFs) to be positive at NLO in the $\overline{MS}$ factorization scheme. We present some additional material that was useful in completing the steps for the actual proof, but ...
Alessandro Candido, Stefano Forte, Felix Hekhorn
doaj   +1 more source

Photon Generalized Parton Distributions

, 2011
We present a calculation of the generalized parton distributions of the photon using overlaps of photon light-front wave functions.Comment: Talk given at LightCone 2011, 4 pages, 3 ...
A.V. Belitsky, Asmita Mukherjee, D. Chakrabarti, J.P. Ralston, K. Goeke, M. Burkardt, M. Diehl, R. Manohar, S. Boffi, S. Friot, S.J. Brodsky, S.J. Brodsky, Sreeraj Nair   +12 more
core   +1 more source

A Stochastic Approach to Quantifying the Propagation of Uncertainty in Soil Organic Carbon Content

Journal of Plant Nutrition and Soil Science, Volume 189, Issue 1, Page 117-130, February 2026.
ABSTRACT Background Precision agriculture (PA) is a site‐specific management approach that utilises spatiotemporal information to improve productivity while also promoting sustainability. Accurate estimates of soil properties, along with the uncertainty of these estimates, are necessary for decision‐making in PA.
Leonardo Inforsato, Pablo Rosso, Magdalena Main‐Knorn, Ahsan Raza, Siyu Huang, Gohar Ghazaryan, Claas Nendel   +6 more
wiley   +1 more source

A critical study of the Monte Carlo replica method

Journal of High Energy Physics
We present a detailed mathematical study of the Monte Carlo replica method as applied in the global fitting literature from the high-energy physics theory community.
Mark N. Costantini, Maeve Madigan, Luca Mantani, James M. Moore   +3 more
doaj   +1 more source

ChiliPDF: Chebyshev interpolation for parton distributions

European Physical Journal C: Particles and Fields, 2022
Parton distribution functions (PDFs) are an essential ingredient for theoretical predictions at colliders. Since their exact form is unknown, their handling and delivery for practical applications relies on approximate numerical methods.
Markus Diehl, Riccardo Nagar, Frank J. Tackmann   +2 more
doaj   +1 more source

Nucleon parton distributions in a light-front quark model

, 2017
Continuing with our analysis of parton distributions in the nucleon, we extend our light-front quark model in order to obtain both the helicity independent and helicity dependent parton distributions, analytically matching the results of global fits at ...
Gutsche, Thomas, Lyubovitskij, Valery E., Schmidt, Ivan   +2 more
core   +1 more source

Drell-Yan lepton pair production at low invariant masses: transverse-momentum resummation and non-perturbative effects in QCD

Journal of High Energy Physics
We consider the transverse-momentum (q T ) distribution of Drell-Yan lepton pairs produced with invariant masses (M) from low values up to the Z-boson peak (4 ≤ M ≤ 116 GeV).
Stefano Camarda, Giancarlo Ferrera, Lorenzo Rossi   +2 more
doaj   +1 more source

Pion Parton Distributions in a non local Lagrangian [PDF]

, 2006
We use phenomenological nonlocal Lagrangians, which lead to non trivial forms for the quark propagator, to describe the pion. We define a procedure, based on the Dyson-Schwinger equations, for the calculation of the pion parton distributions at low Q^2 ...
Alberg, Altarelli, Altarelli, Anikin, Arriola, Arriola, Aurenche, Badier), Ball, Bender, Best, Betev), Bissey, Bowman, Bowman, Burden, Conway, Curtis, Davidson, Detmold, Diehl, Dyakonov, Hawes, Hecht, Ji, Munczek, Müller, Nambu, Noguera, Noguera, Polyakov, Polyakov, Radyushkin, Roberts, S. Noguera, Scopetta, Scopetta, Sutton, Tiburzi, Traini, V. Vento   +40 more
core   +2 more sources

Quantum Spin Liquids Stabilized by Disorder in Non‐Kramers Pyrochlores

Annalen der Physik, Volume 538, Issue 1, January 2026.
This study explores how random structural disorder induces a quantum spin‐liquid phase in non‐Kramers pyrochlore oxides. Using a real‐space gauge mean‐field approach to the random transverse‐field Ising model, we demonstrate that the quantum spin ice appears and remains remarkably robust against disorder, with only a narrow Griffiths region near the ...
Marcus V. Marinho, Eric C. Andrade
wiley   +1 more source

LiDAR‐derived forest inventory data to map and quantify ecologically important large trees across large spatial extents

Ecological Applications, Volume 36, Issue 1, January 2026.
Abstract Large old trees are widely recognized as ecologically important across forest landscapes and concern regarding the decline of these trees is well documented because of their role in maintaining biodiversity for a broad range of organisms. In response to a growing need to inventory such trees, we developed and present the methodology to map and
Douglas G. Pitt, Lisa A. Venier, Greg W. Adams, Andrew W. McCartney   +3 more
wiley   +1 more source