Nuclear Uncertainties in the Determination of Proton PDFs

Richard D. Ball; Emanuele R. Nocera; Rosalyn L. Pearson

doi:10.1140/epjc/s10052-019-6793-5

Nuclear Uncertainties in the Determination of Proton PDFs

Richard D. Ball, Emanuele R. Nocera, Rosalyn L. Pearson

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

We show how theoretical uncertainties due to nuclear effects may be incorporated into global fits of proton parton distribution functions (PDFs) that include deep-inelastic scattering and Drell-Yan data on nuclear targets. We specifically consider the CHORUS, NuTeV and E605 data included in the NNPDF3.1 fit, which used Pb, Fe and Cu targets, respectively. We show that the additional uncertainty in the proton PDFs due to nuclear effects is small, as expected, and in particular that the effect on the $\bar{d}/\bar{u}$ ratio, the total strangeness $s+\bar{s}$, and the strange valence distribution $s-\bar{s}$ is negligible.

Original language	English
Number of pages	34
Journal	The European Physical Journal C
Volume	C79
Issue number	3
Early online date	27 Mar 2019
DOIs	https://doi.org/10.1140/epjc/s10052-019-6793-5
Publication status	E-pub ahead of print - 27 Mar 2019

Keywords / Materials (for Non-textual outputs)

hep-ph

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10.1140/epjc/s10052-019-6793-5Licence: Creative Commons: Attribution (CC-BY)

82120266Ball - 1812.09074Accepted author manuscript, 4.4 MBLicence: Creative Commons: Attribution (CC-BY)

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title = "Nuclear Uncertainties in the Determination of Proton PDFs",

abstract = " We show how theoretical uncertainties due to nuclear effects may be incorporated into global fits of proton parton distribution functions (PDFs) that include deep-inelastic scattering and Drell-Yan data on nuclear targets. We specifically consider the CHORUS, NuTeV and E605 data included in the NNPDF3.1 fit, which used Pb, Fe and Cu targets, respectively. We show that the additional uncertainty in the proton PDFs due to nuclear effects is small, as expected, and in particular that the effect on the $\bar{d}/\bar{u}$ ratio, the total strangeness $s+\bar{s}$, and the strange valence distribution $s-\bar{s}$ is negligible. ",

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note = "34 pages, 15 figures, 4 tables",

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AU - Ball, Richard D.

AU - Nocera, Emanuele R.

AU - Pearson, Rosalyn L.

N1 - 34 pages, 15 figures, 4 tables

PY - 2019/3/27

Y1 - 2019/3/27

N2 - We show how theoretical uncertainties due to nuclear effects may be incorporated into global fits of proton parton distribution functions (PDFs) that include deep-inelastic scattering and Drell-Yan data on nuclear targets. We specifically consider the CHORUS, NuTeV and E605 data included in the NNPDF3.1 fit, which used Pb, Fe and Cu targets, respectively. We show that the additional uncertainty in the proton PDFs due to nuclear effects is small, as expected, and in particular that the effect on the $\bar{d}/\bar{u}$ ratio, the total strangeness $s+\bar{s}$, and the strange valence distribution $s-\bar{s}$ is negligible.

AB - We show how theoretical uncertainties due to nuclear effects may be incorporated into global fits of proton parton distribution functions (PDFs) that include deep-inelastic scattering and Drell-Yan data on nuclear targets. We specifically consider the CHORUS, NuTeV and E605 data included in the NNPDF3.1 fit, which used Pb, Fe and Cu targets, respectively. We show that the additional uncertainty in the proton PDFs due to nuclear effects is small, as expected, and in particular that the effect on the $\bar{d}/\bar{u}$ ratio, the total strangeness $s+\bar{s}$, and the strange valence distribution $s-\bar{s}$ is negligible.

KW - hep-ph

U2 - 10.1140/epjc/s10052-019-6793-5

DO - 10.1140/epjc/s10052-019-6793-5

M3 - Article

SN - 1434-6044

VL - C79

JO - The European Physical Journal C

JF - The European Physical Journal C

IS - 3

ER -

Nuclear Uncertainties in the Determination of Proton PDFs

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