Zobrazeno 1 - 10
of 10 700
pro vyhledávání: '"A, Stegeman"'
Autor:
Cridge, Thomas, Harland-Lang, Lucian A., McGowan, Jamie, Thorne, Robert S., Ball, Richard D., Candido, Alessandro, Carrazza, Stefano, Cruz-Martinez, Juan, Del Debbio, Luigi, Forte, Stefano, Hekhorn, Felix, Magni, Giacomo, Nocera, Emanuele R., Rabemananjara, Tanjona R., Rojo, Juan, Stegeman, Roy, Ubiali, Maria
We discuss how the two existing approximate N$^3$LO (aN$^3$LO) sets of parton distributions (PDFs) from the MSHT20 and NNPDF4.0 series can be combined for LHC phenomenology, both in the pure QCD case and for the QCD$\otimes$QED sets that include the
Externí odkaz:
http://arxiv.org/abs/2411.05373
Hyperparameter Optimisation in Deep Learning from Ensemble Methods: Applications to Proton Structure
Autor:
Cruz-Martinez, Juan, Jansen, Aaron, van Oord, Gijs, Rabemananjara, Tanjona R., Rocha, Carlos M. R., Rojo, Juan, Stegeman, Roy
Deep learning models are defined in terms of a large number of hyperparameters, such as network architectures and optimiser settings. These hyperparameters must be determined separately from the model parameters such as network weights, and are often
Externí odkaz:
http://arxiv.org/abs/2410.16248
Publikováno v:
JHEP 10 (2024) 004
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 explicit use of the freedom to choose the number of active flavors at
Externí odkaz:
http://arxiv.org/abs/2408.07383
Autor:
The NNPDF Collaboration, Ball, Richard D., Barontini, Andrea, Candido, Alessandro, Carrazza, Stefano, Cruz-Martinez, Juan, Del Debbio, Luigi, Forte, Stefano, Giani, Tommaso, Hekhorn, Felix, Kassabov, Zahari, Laurenti, Niccolò, Magni, Giacomo, Nocera, Emanuele R., Rabemananjara, Tanjona R., Rojo, Juan, Schwan, Christopher, Stegeman, Roy, Ubiali, Maria
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-next-to-next-to-leading order (aN$^3$LO). We construct an approximation
Externí odkaz:
http://arxiv.org/abs/2402.18635
Autor:
Candido, Alessandro, Hekhorn, Felix, Magni, Giacomo, Rabemananjara, Tanjona R., Stegeman, Roy
Publikováno v:
Eur.Phys.J.C 84 (2024) 7, 697
We present yadism, a library for the evaluation of both polarized and unpolarized deep-inelastic scattering (DIS) structure functions and cross sections up to N$^3$LO in perturbative QCD. The package provides computations of observables in fixed-flav
Externí odkaz:
http://arxiv.org/abs/2401.15187
Autor:
The NNPDF Collaboration, Ball, Richard D., Barontini, Andrea, Candido, Alessandro, Carrazza, Stefano, Cruz-Martinez, Juan, Del Debbio, Luigi, Forte, Stefano, Giani, Tommaso, Hekhorn, Felix, Kassabov, Zahari, Laurenti, Niccolò, Magni, Giacomo, Nocera, Emanuele R., Rabemananjara, Tanjona R., Rojo, Juan, Schwan, Christopher, Stegeman, Roy, Ubiali, Maria
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 PDFs. We use our previously published methodology, based on the treatme
Externí odkaz:
http://arxiv.org/abs/2401.10319
Autor:
Hekhorn, Felix, Magni, Giacomo, Nocera, Emanuele R., Rabemananjara, Tanjona R., Rojo, Juan, Schaus, Adrianne, Stegeman, Roy
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 $\mathcal{O}(\alpha_s^2)$. We quantify the impact of charm quark mass and h
Externí odkaz:
http://arxiv.org/abs/2401.10127
Autor:
The NNPDF Collaboration, Ball, Richard D., Barontini, Andrea, Candido, Alessandro, Carrazza, Stefano, Cruz-Martinez, Juan, Del Debbio, Luigi, Forte, Stefano, Giani, Tommaso, Hekhorn, Felix, Kassabov, Zahari, Laurenti, Niccolò, Magni, Giacomo, Nocera, Emanuele R., Rabemananjara, Tanjona R., Rojo, Juan, Schwan, Christopher, Stegeman, Roy, Ubiali, Maria
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 formalism, while QED evolution accounting for O(alpha), O(alpha alphas) a
Externí odkaz:
http://arxiv.org/abs/2401.08749
Autor:
Jin, Mike, Duggan, Nicole M, Bashyakarla, Varoon, Mendicuti, Maria Alejandra Duran, Hallisey, Stephen, Bernier, Denie, Stegeman, Joseph, Duhaime, Erik, Kapur, Tina, Goldsmith, Andrew J
Accurate and scalable annotation of medical data is critical for the development of medical AI, but obtaining time for annotation from medical experts is challenging. Gamified crowdsourcing has demonstrated potential for obtaining highly accurate ann
Externí odkaz:
http://arxiv.org/abs/2312.10198
Autor:
Ball, Richard D., Candido, Alessandro, Cruz-Martinez, Juan, Forte, Stefano, Giani, Tommaso, Hekhorn, Felix, Magni, Giacomo, Nocera, Emanuele R., Rojo, Juan, Stegeman, Roy
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 charm distribution. A significant nonvanishing valence component cann
Externí odkaz:
http://arxiv.org/abs/2311.00743