On Matter and Pressure Distribution in Nucleons

Fiore, R.; Jenkovszky, L. L.; Maryna, Oleksiienko,

doi:10.1134/s1547477121050058

Cited by 5 publications

(6 citation statements)

References 20 publications

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“…where the constraint is the consequence of momentum conservation [1,35]. Moreover, the gluon contribution was obtained from CT18 global QCD analysis [36] and agrees with other LQCD results [10,37,38]. Therefore, the parameter in is fixed in this study, and is a free parameter determined by fitting experimental data.…”

Section: J/ψsupporting

confidence: 81%

Gluon gravitational form factors of protons from charmonium photoproduction*

2023

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Inspired by the recent near-threshold J/ψ photoproduction measurements, we discuss gluon gravitational form factors (GFFs) and internal properties of the proton. This work presents a complete set analysis of the proton gluon GFFs connecting the gluon part of the energy-momentum tensor and the heavy quarkonium pho toproduction. In particular, the gluon GFFs as functions of the squared momentum transfer t are determined by a global fitting of the J/ψ differential and total cross section experimental data. Combined with the quark contributions to the D-term form factor extracted from the deeply virtual Compton scattering experiment, the total D-term are obtained to investigate their applications for the description of the proton mechanical properties. These researches provide a unique perspective for studying the proton gluon GFFs and important information for improving QCD constraints on the gluon GFFs. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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Section: J/ψsupporting

confidence: 81%

Gluon gravitational form factors of protons from charmonium photoproduction*

2023

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“…where the constraint is the consequence of momentum conservation [4,42], and and are free parameters. The gluon contribution was obtained from global QCD analysis [43] and agrees with other LQCD results [9,44,45]. In this study, to mirror the mass distribution inside the proton, the mean square radius of the mass distribution (A-term mass radius) is defined as…”

Section: Internal Nature Of the Protonsupporting

confidence: 70%

Gravitational form factors of the proton from near-threshold vector meson photoproduction*

Wang 王,

Zeng 曾,

Zhang 张

2024

Chinese Phys. C

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We embark on a systematical analysis of the quark and gluon gravitational form factors (GFFs) of the proton, by connecting energy-momentum tensor (EMT) and the near-threshold vector meson photoproduction (NTVMP). Concretely, the quark contributions of GFFs are determined by global fitting the cross section of the lightest vector meson ρ0 photoproduction. Combined with the gluon GFFs achieved from heavy quarko nium J/ψ photoproduction data, the complete GFFs are obtained and compared with the experimental results and Lattice QCD determinations. In addition, we use the Resonances Via Pad´e (RVP) method based on the Schlessinger Point Method (SPM) to obtain a model-independent quark D-term distribution by direct analytical continuation of Deep Virtual Compton Scattering (DVCS) experimental data. If errors are considered, the results obtained by RVP are basically consistent with those obtained by NTVMP. Moreover, the comprehensive information on GFFs helps us to uncover the mass distribution and mechanical properties inside the proton. This work is not only an important basis for delving the proton enigmatic properties, but also have significance theoretical guiding for future JLab and EICs experimental measurements. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…Here, D g (t) is the gluonic form factor, which is usually parameterized as the tripole form and provided as [7,26]…”

Section: Proton Mechanical Propertiesmentioning

confidence: 99%

“…The form factor on the quarks inside the proton can be determined by fitting the DVCS data [7]. One work determined the D q (t) as [5,26]…”

Section: Proton Mechanical Propertiesmentioning

confidence: 99%

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Gluon gravitational form factors of the proton from the charmonium photoproduction

Wang¹,

Zeng²

2022

Preprint

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Inspired by the recent J/ψ photoproduction measurements, we discuss the D-term gravitational form factors (GFFs) and the mechanical properties of the proton. Under the assumption of the tripole form, the gluon D-term form factor is determined by fitting the J/ψ differential cross-section data. Combined with the quark D-term form factor extracted from the deeply virtual Compton scattering experiment, the total D-term form factor is obtained to investigate their applications for the description of the mechanical properties. Moreover, the predicted gluon D-term form factor is compared with the existing lattice quantum chromodynamics determinations, which indicates our result is overestimated in momentum transfer |t| < 0.5 GeV 2 . Accordingly, the distributions of pressure and shear forces inside the proton are investigated. Finally, the root-mean-square (rms) proton mechanical radius R 2 mech = 0.86 ± 0.03 fm, while the rms pressure p(0) = 1.42 ± 0.07 GeV/fm 3 in the center of nucleon are calculated. These results provide a unique perspective for studying the gluon D-term form factor of proton and important information for revealing the internal pressure and shear distributions of nucleons.

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On Matter and Pressure Distribution in Nucleons

Cited by 5 publications

References 20 publications

Gluon gravitational form factors of protons from charmonium photoproduction*

Gluon gravitational form factors of protons from charmonium photoproduction*

Gravitational form factors of the proton from near-threshold vector meson photoproduction*

Gluon gravitational form factors of the proton from the charmonium photoproduction

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