Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Richard D Ball"'
Autor:
Richard D. Ball, Andrea Barontini, Alessandro Candido, Stefano Carrazza, Juan Cruz-Martinez, Luigi Del Debbio, Stefano Forte, Tommaso Giani, Felix Hekhorn, Zahari Kassabov, Niccolò Laurenti, Giacomo Magni, Emanuele R. Nocera, Tanjona R. Rabemananjara, Juan Rojo, Christopher Schwan, Roy Stegeman, Maria Ubiali, The NNPDF Collaboration
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 7, Pp 1-59 (2024)
Abstract 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 ( $$\hbox {aN}^3\hbox {LO}$$ aN 3
Externí odkaz:
https://doaj.org/article/296033acd0904665a86ae1823d3076dd
Autor:
NNPDF Collaboration, Richard D. Ball, Andrea Barontini, Alessandro Candido, Stefano Carrazza, Juan Cruz-Martinez, Luigi Del Debbio, Stefano Forte, Tommaso Giani, Felix Hekhorn, Zahari Kassabov, Niccolò Laurenti, Giacomo Magni, Emanuele R. Nocera, Tanjona R. Rabemananjara, Juan Rojo, Christopher Schwan, Roy Stegeman, Maria Ubiali
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-29 (2024)
Abstract 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 $${\mathcal {O}}\l
Externí odkaz:
https://doaj.org/article/4b66f6cbc46840dba9a0b065ea24384b
Autor:
NNPDF Collaboration, Richard D. Ball, Andrea Barontini, Alessandro Candido, Stefano Carrazza, Juan Cruz-Martinez, Luigi Del Debbio, Stefano Forte, Tommaso Giani, Felix Hekhorn, Zahari Kassabov, Niccolò Laurenti, Giacomo Magni, Emanuele R. Nocera, Tanjona R. Rabemananjara, Juan Rojo, Christopher Schwan, Roy Stegeman, Maria Ubiali
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-22 (2024)
Abstract 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 th
Externí odkaz:
https://doaj.org/article/277890b654114e59856324cce9eeee04
Autor:
Richard D. Ball, Alessandro Candido, Stefano Forte, Felix Hekhorn, Emanuele R. Nocera, Juan Rojo, Christopher Schwan
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 12, Pp 1-25 (2022)
Abstract We discuss the sensitivity of theoretical predictions of observables used in searches for new physics to parton distributions (PDFs) at large momentum fraction x. Specifically, we consider the neutral-current Drell–Yan production of gauge
Externí odkaz:
https://doaj.org/article/a815fb3aa9fb4ae6a3f83f4fc11830f5
Autor:
Richard D. Ball, Stefano Carrazza, Juan Cruz-Martinez, Luigi Del Debbio, Stefano Forte, Tommaso Giani, Shayan Iranipour, Zahari Kassabov, Jose I. Latorre, Emanuele R. Nocera, Rosalyn L. Pearson, Juan Rojo, Roy Stegeman, Christopher Schwan, Maria Ubiali, Cameron Voisey, Michael Wilson
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 5, Pp 1-119 (2022)
Abstract We present a new set of parton distribution functions (PDFs) based on a fully global dataset and machine learning techniques: NNPDF4.0. We expand the NNPDF3.1 determination with 44 new datasets, mostly from the LHC. We derive a novel methodo
Externí odkaz:
https://doaj.org/article/cf770ba8c45e4e92ad3427830e45acc8
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-18 (2021)
Abstract We study the correlation between different sets of parton distributions (PDFs). Specifically, viewing different PDF sets as distinct determinations, generally correlated, of the same underlying physical quantity, we examine the extent to whi
Externí odkaz:
https://doaj.org/article/447743d2e2614e9cb103778b077ac897
Autor:
NNPDF Collaboration, Richard D. Ball, Stefano Carrazza, Juan Cruz-Martinez, Luigi Del Debbio, Stefano Forte, Tommaso Giani, Shayan Iranipour, Zahari Kassabov, Jose I. Latorre, Emanuele R. Nocera, Rosalyn L. Pearson, Juan Rojo, Roy Stegeman, Christopher Schwan, Maria Ubiali, Cameron Voisey, Michael Wilson
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 10, Pp 1-12 (2021)
Abstract We present the software framework underlying the NNPDF4.0 global determination of parton distribution functions (PDFs). The code is released under an open source licence and is accompanied by extensive documentation and examples. The code ba
Externí odkaz:
https://doaj.org/article/a9ac57ce78a845eda3ef6e70c62686a8
Autor:
Richard D. Ball, Rosalyn L. Pearson
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 9, Pp 1-27 (2021)
Abstract We show how to account for correlations between theoretical uncertainties incorporated in parton distribution function (PDF) fits, and the theoretical uncertainties in the predictions made using these PDFs. We demonstrate by explicit calcula
Externí odkaz:
https://doaj.org/article/707293c0d2f64966b7f43669355c8c45
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 1, Pp 1-12 (2021)
Abstract We evaluate the uncertainties due to nuclear effects in global fits of proton parton distribution functions (PDFs) that utilise deep-inelastic scattering and Drell–Yan data on deuterium targets. To do this we use an iterative procedure to
Externí odkaz:
https://doaj.org/article/b3c3ee9629a24db595af80ccda68d4be
Parton distributions with theory uncertainties: general formalism and first phenomenological studies
Autor:
Rabah Abdul Khalek, Richard D. Ball, Stefano Carrazza, Stefano Forte, Tommaso Giani, Zahari Kassabov, Rosalyn L. Pearson, Emanuele R. Nocera, Juan Rojo, Luca Rottoli, Maria Ubiali, Cameron Voisey, Michael Wilson
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 11, Pp 1-61 (2019)
Abstract We formulate a general approach to the inclusion of theoretical uncertainties, specifically those related to the missing higher order uncertainty (MHOU), in the determination of parton distribution functions (PDFs). We demonstrate how, under
Externí odkaz:
https://doaj.org/article/ce452379d1424567a6dbed714b33f9b8