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CERN Document Server 15 notices trouvées  1 - 10suivant  aller vers la notice: La recherche a duré 0.87 secondes. 
1.
Combination of aN$^3$LO PDFs and implications for Higgs production cross-sections at the LHC / MSHT Collaboration
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 photon PDF. [...]
arXiv:2411.05373 ; DESY-24-134 ; TIF-UNIMI-2024-17 ; Edinburgh 2024/9 ; CERN-TH-2024-167.
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Qibocal: an open-source framework for calibration of self-hosted quantum devices / Pasquale, Andrea (Milan U. ; Technol. Innovation Inst., UAE ; INFN, Milan ; INFN, Milan Bicocca) ; Pedicillo, Edoardo (Milan U. ; Technol. Innovation Inst., UAE) ; Cereijo, Juan (Technol. Innovation Inst., UAE) ; Ramos-Calderer, Sergi (Technol. Innovation Inst., UAE ; ICC, Barcelona U.) ; Candido, Alessandro (CERN) ; Palazzo, Gabriele (Technol. Innovation Inst., UAE ; Milan Bicocca U. ; Unlisted, IT) ; Carobene, Rodolfo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Gobbo, Marco (Milan Bicocca U. ; INFN, Milan Bicocca) ; Efthymiou, Stavros (Technol. Innovation Inst., UAE) ; Tan, Yuanzheng Paul (Nanyang Technol. U.) et al.
Calibration of quantum devices is fundamental to successfully deploy quantum algorithms on current available quantum hardware. [...]
TIF-UNIMI-2024-16 ; CERN-TH-2024-160 ; arXiv:2410.00101.
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3.
An FONLL prescription with coexisting flavor number PDFs / Barontini, Andrea (INFN, Milan ; Milan U.) ; Candido, Alessandro (INFN, Milan ; Milan U. ; CERN) ; Hekhorn, Felix (INFN, Milan ; Milan U. ; Jyvaskyla U. ; Helsinki U.) ; Magni, Giacomo (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Stegeman, Roy (U. Edinburgh, Higgs Ctr. Theor. Phys.)
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 a given scale and, thus, use coexisting PDFs with different active flavor number. [...]
arXiv:2408.07383; Nikhef-2024-014; Edinburgh 2024/5; TIF-UNIMI-2024-13.- 2024-10-01 - 17 p. - Published in : JHEP 2410 (2024) 004 Fulltext: document - PDF; 2408.07383 - PDF;
4.
An open-source framework for quantum hardware control / Pedicillo, Edoardo (Technol. Innovation Inst., UAE ; Milan U.) ; Candido, Alessandro (CERN) ; Efthymiou, Stavros (Technol. Innovation Inst., UAE) ; Sargsyan, Hayk (Technol. Innovation Inst., UAE) ; Tan, Yuanzheng Paul (Nanyang Technol. U.) ; Cereijo, Juan (Technol. Innovation Inst., UAE) ; Khoo, Jun Yong (A-STAR, Singapore) ; Pasquale, Andrea (Technol. Innovation Inst., UAE ; Milan U.) ; Robbiati, Matteo (Milan U. ; CERN) ; Carrazza, Stefano (Technol. Innovation Inst., UAE ; Milan U. ; CERN)
The development of quantum computers needs reliable quantum hardware and tailored software for controlling electronics specific to various quantum platforms. [...]
TIF-UNIMI-2024-10 CERN-TH-2024-126 ; CERN-TH-2024-126 ; arXiv:2407.21737.
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The path to $\hbox {N}^3\hbox {LO}$ parton distributions / NNPDF Collaboration
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 to the N$^3$LO splitting functions that includes all available partial information from both fixed-order computations and from small and large $x$ resummation, and estimate the uncertainty on this approximation by varying the set of basis functions used to construct the approximation. [...]
arXiv:2402.18635; Nikhef-2023-020; TIF-UNIMI-2023-23; Edinburgh 2023/29.- 2024-07-03 - 59 p. - Published in : Eur. Phys. J. C 84 (2024) 659 Fulltext: 2402.18635 - PDF; Publication - PDF;
6.
Bayesian Inference with Gaussian Processes for the Determination of Parton Distribution Functions / Candido, Alessandro (CERN) ; Del Debbio, Luigi (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Giani, Tommaso (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Petrillo, Giacomo (Florence U.)
We discuss a Bayesian methodology for the solution of the inverse problem underlying the determination of parton distribution functions (PDFs). In our approach, Gaussian Processes (GPs) are used to model the PDF prior, while Bayes theorem is used in order to determine the posterior distribution of the PDFs given a set of data. [...]
arXiv:2404.07573.- 2024-07-22 - 17 p. - Published in : Eur. Phys. J. C 84 (2024) 716 Fulltext: 2404.07573 - PDF; document - PDF;
7.
Yadism: Yet Another Deep-Inelastic Scattering Module / Candido, Alessandro (INFN, Milan ; Milan U. ; CERN) ; Hekhorn, Felix (INFN, Milan ; Milan U. ; Jyvaskyla U. ; Helsinki U.) ; Magni, Giacomo (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Rabemananjara, Tanjona R. (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Stegeman, Roy (U. Edinburgh, Higgs Ctr. Theor. Phys.)
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-flavor and zero-mass variable flavor number schemes. [...]
arXiv:2401.15187; CERN-TH-2024-015; Edinburgh 2024/4; Nikhef-2024-002.- 2024-07-15 - 28 p. - Published in : Eur. Phys. J. C 84 (2024) 697 Fulltext: document - PDF; 2401.15187 - PDF;
8.
Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy / NNPDF Collaboration
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 treatment of MHOUs and their full correlations through a theory covariance matrix determined by scale variation, now fully incorporated in the new NNPDF theory pipeline. [...]
arXiv:2401.10319; TIF-UNIMI-2023-22; Edinburgh 2023/34; CERN-TH-2024-009.- 2024-05-21 - 23 p. - Published in : Eur. Phys. J. C 84 (2024) 517 Fulltext: document - PDF; 2401.10319 - PDF;
9.
Photons in the proton: implications for the LHC / NNPDF Collaboration
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) and O(alpha^2) corrections is implemented and benchmarked by means of the EKO code. [...]
arXiv:2401.08749; TIF-UNIMI-2023-17; Edinburgh 2023/19; CERN-TH-2023-159.- 2024-05-28 - 32 p. - Published in : Eur. Phys. J. C 84 (2024) 540 Fulltext: document - PDF; 2401.08749 - PDF;
10.
The intrinsic charm quark valence distribution of the proton / Ball, Richard D. (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Candido, Alessandro (INFN, Milan ; Milan U. ; CERN) ; Cruz-Martinez, Juan (CERN) ; Forte, Stefano (INFN, Milan ; Milan U.) ; Giani, Tommaso (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Hekhorn, Felix (INFN, Milan ; Milan U. ; Jyvaskyla U. ; Helsinki U.) ; Magni, Giacomo (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Nocera, Emanuele R. (Turin U.) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Stegeman, Roy (U. Edinburgh, Higgs Ctr. Theor. Phys.) /NNPDF Collaboration
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. [...]
arXiv:2311.00743; Edinburgh 2023/22; TIF-UNIMI-2023-28; Nikhef 2023-012, CERN-TH-2023-196.- 2024-05-01 - 11 p. - Published in : Phys. Rev. D 109 (2024) L091501 Fulltext: PDF;

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