Impact of lattice strangeness asymmetry data in the CTEQ-TEA global analysis - INSPIRE

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Impact of lattice strangeness asymmetry data in the CTEQ-TEA global analysis

Tie-Jiun Hou
(
- U. South China, Hengyang
)
,
Huey-Wen Lin
(
- Michigan State U. and
- Michigan State U., East Lansing (main)
)
,
Mengshi Yan
(
- Peking U. and
- Peking U., SKLNPT
)
,
C.-P. Yuan
(
- Michigan State U.
)

Nov 20, 2022

37 pages

Published in:

Phys.Rev.D 107 (2023) 7, 076018

Published: Apr 1, 2023

e-Print:

2211.11064 [hep-ph]

DOI:

10.1103/PhysRevD.107.076018 (publication)

View in:

ADS Abstract Service

reference search21 citations

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Abstract: (APS)

We study the impact of lattice data on the determination of the strangeness asymmetry distribution

s_{-} (x) \equiv s (x) - \bar{s} (x)

in the general CTEQ-TEA global analysis of parton distribution functions (PDFs) of the proton. Firstly, we find that allowing a nonvanishing

s_{-} (x)

, at the initial

Q_{0} = 1.3 GeV

scale, in a global PDF analysis leads to a CT18As fit with similar quality to CT18A. Secondly, including the lattice data in the CT18As_Lat fit greatly reduces the

s_{-}

-PDF error band size in the large-

x

region. To further reduce its error would require more precise lattice data, extended to smaller

x

values. We take ATLAS 7 TeV

W

and

Z

production data, SIDIS dimuon production data,

F_{3}

structure function data, E866 NuSea data, and E906 SeaQuest data as examples to illustrate the implication of CT18As and CT18As_Lat fits. The parametrization dependence for PDF ratio

(s + \bar{s}) / (\bar{u} + \bar{d}) (x)

is analyzed with CT18As2 and CT18As2_Lat fits as results.

Note:

37 pages, 19 figures. arXiv admin note: text overlap with arXiv:2204.07944

strangeness: asymmetry
parton: distribution function
deep inelastic scattering: semi-inclusive reaction
lattice
GeV
structure function
parametrization
interpretation of experiments: ATLAS
quality
numerical calculations

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