Zobrazeno 1 - 10
of 1 177
pro vyhledávání: '"Ball, P. D."'
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
Autor:
Lazarević, Sanja, Filipović, Miroslav D., Koribalski, Bärbel S., Smeaton, Zachary J., Hopkins, Andrew M., Alsaberi, Rami Z. E., Velović, Velibor, Ball, Brianna D., Kothes, Roland, Leahy, Denis, Ingallinera, Adriano
Publikováno v:
Research Notes of the American Astronomical Society, 8, 107 (2024)
We report the ASKAP discovery of a new Galactic supernova remnant (SNR) candidate G308.73+1.38, which we name Raspberry. This new SNR candidate has an angular size of 20.7 arcmin $\times$ 16.7 arcmin, and we measure a total integrated flux of 407$\pm
Externí odkaz:
http://arxiv.org/abs/2405.03733
Autor:
The NNPDF Collaboration, Ball, Richard D., Barontini, Andrea, Candido, Alessandro, Carrazza, Stefano, Cruz-Martinez, Juan, Del Debbio, Luigi, Forte, Stefano, Giani, Tommaso, Hekhorn, Felix, Kassabov, Zahari, Laurenti, Niccolò, Magni, Giacomo, Nocera, Emanuele R., Rabemananjara, Tanjona R., Rojo, Juan, Schwan, Christopher, Stegeman, Roy, Ubiali, Maria
We extend the existing leading (LO), next-to-leading (NLO), and next-to-next-to-leading order (NNLO) NNPDF4.0 sets of parton distribution functions (PDFs) to approximate next-to-next-to-next-to-leading order (aN$^3$LO). We construct an approximation
Externí odkaz:
http://arxiv.org/abs/2402.18635
Autor:
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:
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:
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
Autor:
Ball, Brianna D., Kothes, Roland, Rosolowsky, Erik, West, Jennifer, Becker, Werner, Filipović, Miroslav D., Gaensler, B. M., Hopkins, Andrew M., Koribalski, Bärbel, Landecker, Tom, Leahy, Denis, Marvil, Joshua, Sun, Xiaohui, Bufano, Filomena, Carretti, Ettore, Ingallinera, Adriano, Van Eck, Cameron L., Willis, Tony
We use data from the pilot observations of the EMU/POSSUM surveys to study the "missing supernova remnant (SNR) problem", the discrepancy between the number of Galactic SNRs that have been observed and the number that are estimated to exist. The Evol
Externí odkaz:
http://arxiv.org/abs/2307.01948
Autor:
The NNPDF Collaboration, Ball, Richard D., Cruz-Martinez, Juan, Del Debbio, Luigi, Forte, Stefano, Kassabov, Zahari, Nocera, Emanuele R., Rojo, Juan, Stegeman, Roy, Ubiali, Maria
We respond to the criticism raised by Courtoy et al., in which the faithfulness of the NNPDF4.0 sampling is questioned and an under-estimate of the NNPDF4.0 PDF uncertainties is implied. We list, correct, and clarify in detail a number of inaccurate
Externí odkaz:
http://arxiv.org/abs/2211.12961
Autor:
Ball, Richard D., Candido, Alessandro, Forte, Stefano, Hekhorn, Felix, Nocera, Emanuele R., Rojo, Juan, Schwan, Christopher
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 bosons wi
Externí odkaz:
http://arxiv.org/abs/2209.08115
Autor:
Ball, Richard D., Candido, Alessandro, Cruz-Martinez, Juan, Forte, Stefano, Giani, Tommaso, Hekhorn, Felix, Kudashkin, Kirill, Magni, Giacomo, Rojo, Juan
Publikováno v:
Nature 608, 483-487 (2022)
The theory of the strong force, quantum chromodynamics, describes the proton in terms of quarks and gluons. The proton is a state of two up quarks and one down quark bound by gluons, but quantum theory predicts that in addition there is an infinite n
Externí odkaz:
http://arxiv.org/abs/2208.08372