EPPS21 : a global QCD analysis of nuclear PDFs

Eskola, Kari J.; Paakkinen, Petja; Paukkunen, Hannu; Salgado, Carlos A.

doi:10.1140/epjc/s10052-022-10359-0

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Eskola, K. J., Paakkinen, P., Paukkunen, H., & Salgado, C. A. (2022). EPPS21 : a global QCD analysis of nuclear PDFs. European Physical Journal C, 82(5), Article 413. https://doi.org/10.1140/epjc/s10052-022-10359-0

Julkaistu sarjassa

European Physical Journal C

Tekijät

Eskola, Kari J. |

Paakkinen, Petja |

Paukkunen, Hannu |

Salgado, Carlos A.

Päivämäärä

2022

Tekijänoikeudet

We present an updated global analysis of collinearly factorized nuclear parton distribution functions (PDFs) at next-to-leading order in perturbative QCD. In comparison to our previous fit, EPPS16, the present analysis includes more data from proton-lead collisions at the Large Hadron Collider: 5 TeV double-differential CMS dijet and LHCb D-meson data, as well as 8 TeV CMS W± data. These new data lead to significantly better-constrained gluon distributions at small and intermediate values of the momentum fraction x, confirming the presence of shadowing and antishadowing for gluons in large nuclei. In addition, we include Jefferson Lab measurements of deeply inelastic scattering which probe nuclear PDFs at large x and low virtualities. For the first time within the Hessian framework, we now also explore the uncertainties of nuclear PDFs due to the errors in the baseline proton PDFs. We release the results of our analysis as a new public parametrization of nuclear PDFs called EPPS21.

Julkaisija

Springer

ISSN Hae Julkaisufoorumista

1434-6044

Rahoittaja(t)

Suomen Akatemia

Rahoitusohjelmat(t)

Akatemiahanke, SA; Huippuyksikkörahoitus, SA; Akatemiatutkija, SA

Lisätietoja rahoituksesta

We acknowledge financial support from the Academy of Finland Projects 297058 and 330448 (K.J.E.), and 308301 (H.P.), Xunta de Galicia (Centro singular de investigacián de Galicia accreditation 2019-2022), European Union ERDF, the María de Maeztu Units of Excellence program MDM-2016-0692 and the Spanish Research State Agency, European Research Council project ERC-2018-ADG-835105 YoctoLHC. The Fin ... showmore

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