111 citations · 441 across the 35 of their papers we have counts for
38 papers · 1 filter
New parton distribution functions of the real photon
Madhav Chithirasreemadam, Vadim Guzey, Felix Hekhorn +2
Precise determination of the partonic structure of real photons has attracted renewed interest in view of ongoing studies of high-energy photon-induced processes in ultraperipheral…
Towards the new NNPDF4.1 global analysis
Felix Hekhorn
We review progress and plans towards a new global PDF analysis from the NNPDF Collaboration. This new release will be based on state-of-the-art theory calculations, and in particul…
Towards new D meson fragmentation functions
Manuel Epele, Felix Hekhorn, Ilkka Helenius +2
The Heavy Meson (Hymn) collaboration presents a new extraction of D meson fragmentation functions using experimental data from LEP and LHC. We focus particularly on kinematical reg…
Deeply Inelastic Scattering Revisited
Felix Hekhorn
Due to its conceptual simplicity, Deeply Inelastic Scattering (DIS) often serves as a textbook example for Quantum Chromo Dynamics (QCD) and partonic structure of nucleons. However…
VALO1.0: New real-photon parton distributions with Monte Carlo uncertainties
Madhav Chithirasreemadam, Vadim Guzey, Felix Hekhorn +2
Performing a global QCD analysis of data on the photon structure function in scattering, we determine new leading order (LO) and next-to-leading (NLO) parton…
Inclusive charm and bottom quark pair production cross sections at hadron colliders at next-to-next-to-leading-order accuracy
David d'Enterria, Felix Hekhorn, Ilkka Helenius +2
The inclusive cross sections for charm () and bottom () quark-antiquark pair production in proton-proton, proton-a…
Parton distribution functions and theory parameters: an NNPDF perspective
Richard D. Ball, Tommaso Giani, Felix Hekhorn +5
Parton Distribution Functions (PDFs) are a key ingredient in theoretical predictions for Large Hadron Collider (LHC) observables and play a central role in the extraction of precis…
A Determination of at Accuracy from a Global PDF Analysis
The NNPDF Collaboration, Richard D. Ball, Andrea Barontini +6
We present a determination of the strong coupling from a global dataset including both fixed-target and collider data from deep-inelastic scattering and a variety of had…
Towards NLO PDFs and their implications for Higgs production cross-sections
Felix Hekhorn
We review the recently published PDF sets MSHT20xNNPDF40_an3lo and MSHT20xNNPDF40_an3lo_qed, which have been obtained by combining the approximate NLO (aNLO) sets of parton…
NNPDFpol2.0: a global determination of polarised PDFs and their uncertainties at next-to-next-to-leading order
Juan Cruz-Martinez, Toon Hasenack, Felix Hekhorn +6
We present NNPDFpol2.0, a new set of collinear helicity parton distribution functions (PDFs) of the proton based on legacy measurements of structure functions in inclusive neutral-…
Combination of aNLO PDFs and implications for Higgs production cross-sections at the LHC
Thomas Cridge, Lucian A. Harland-Lang, Jamie McGowan +14
We discuss how the two existing approximate NLO (aNLO) sets of parton distributions (PDFs) from the MSHT20 and NNPDF4.0 series can be combined for LHC phenomenology, both i…
An FONLL prescription with coexisting flavor number PDFs
Andrea Barontini, Alessandro Candido, Felix Hekhorn +2
We present a new prescription to account for heavy quark mass effects in the determination of parton distribution functions (PDFs) based on the FONLL scheme. Our prescription makes…
A Benchmarking of QCD Evolution at Approximate
A. Cooper-Sarkar, T. Cridge, F. Giuli +6
We present a detailed benchmarking of different treatments of the QCD evolution of unpolarized PDFs at approximate () order in the QCD coupling. Namely, the impleme…
Towards NNPDFpol2.0
Felix Hekhorn
We review the recent efforts in the NNPDF Collaboration towards a new global extraction of polarized parton distributions functions (pPDF). Polarized PDFs are highly relevant for t…
Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report
J. Andersen, B. Assi, K. Asteriadis +81
This report presents a short summary of the activities of the "Standard Model" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 12-30 June, 2023).
On the positivity of MSbar distributions
Felix Hekhorn
We discuss the positivity of parton distribution functions using the common factorization scheme. We find that in the perturbative regime PDFs inher…
Heavy Quarks in Polarised Deep-Inelastic Scattering at the Electron-Ion Collider
Felix Hekhorn, Giacomo Magni, Emanuele R. Nocera +4
We extend the FONLL general-mass variable-flavour-number scheme to the case of longitudinally polarised DIS structure functions, accounting for perturbative corrections up to $\mat…
The Path to NLO Parton Distributions
The NNPDF Collaboration, Richard D. Ball, Andrea Barontini +16
We extend the existing leading (LO), next-to-leading (NLO), and next-to-next-to-leading order (NNLO) NNPDF4.0 sets of parton distribution functions (PDFs) to approximate next-to-ne…
Yadism: Yet Another Deep-Inelastic Scattering Module
Alessandro Candido, Felix Hekhorn, Giacomo Magni +2
We present yadism, a library for the evaluation of both polarized and unpolarized deep-inelastic scattering (DIS) structure functions and cross sections up to NLO in perturbati…
Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy
The NNPDF Collaboration, Richard D. Ball, Andrea Barontini +16
We include uncertainties due to missing higher order corrections to QCD computations (MHOU) used in the determination of parton distributions (PDFs) in the recent NNPDF4.0 set of P…
Photons in the proton: implications for the LHC
The NNPDF Collaboration, Richard D. Ball, Andrea Barontini +16
We construct a set of parton distribution functions (PDFs), based on the recent NNPDF4.0 PDF set, that also include a photon PDF. The photon PDF is constructed using the LuxQED for…
The intrinsic charm quark valence distribution of the proton
Richard D. Ball, Alessandro Candido, Juan Cruz-Martinez +7
We provide a first quantitative indication that the wave function of the proton contains unequal distributions of charm quarks and antiquarks, i.e. a nonvanishing intrinsic valence…
On the positivity of MSbar parton distributions
Alessandro Candido, Stefano Forte, Tommaso Giani +1
We revisit our argument that shows that parton distribution Functions (PDFs) in the MSbar{ scheme are non-negative in the perturbative region, with the main goals of elucidating it…
DGLAP evolution of parton distributions at approximate NLO
Felix Hekhorn, Giacomo Magni
We present recent progress towards a global determination of parton distribution functions (PDFs) at approximate NLO (aNLO) accuracy within the NNPDF framework. We construc…