Flavor-dependent EMC effect from a nucleon swelling model

Wang, Rong; Huang, Y.; Zhang, Baiyang; Niccolai, S.

doi:10.1103/physrevc.99.035205

Cited by 8 publications

(6 citation statements)

References 79 publications

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“…Second, the mass radius of the bound nucleon may be a little bit larger than that of the free nucleon. This result is actually in consistence with the popular "nucleon swelling" picture for the explanation of nuclear medium modifications on parton distribution functions [22][23][24][25]. The "nucleon swelling" in nucleus can be understood as the six-quark bag configuration or the gluon exchanges between the nucleons.…”

Section: Discussion and Summarysupporting

confidence: 66%

The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target

Han,

Xie,

Kou

et al. 2022

Preprint

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Tremendous progresses have been achieved for the proton structure and radius measurements, but not so many for the neutron. In this paper, we extract the mass radii of the neutron and the proton from the analysis of the differential cross sections of near-threshold ω and φ photoproductions on deuterium target, which is regarded as a quasi-free neutron plus a quasi-free proton. The incoherent data of ω and φ photoproductions are provided by CBELSA/TAPS collaboration and LEPS collaboration respectively, where the deuteron is disintegrated in the experiments to measure the properties of the individual nucleons. With the near-threshold data of γd → ωn(p) and γd → ωp(n), the neutron and proton mass radii are determined to be 0.795 ± 0.092 fm and 0.741 ± 0.028 fm respectively. With the near-threshold and incoherent φ photoproduction data of γd → φpn, the average mass radius of the bound nucleon (neutron or proton) inside the deuteron is extracted to be 0.752 ± 0.039 fm. For a comparison study, we also extract the mass radius of the free proton from the exclusive and inclusive ω photoproductions on the hydrogen target by the CBELSA/TAPS collaboration. From our analysis, we find that the neutron mass radius is close to the proton mass radius with no obvious difference, and the nuclear modification on the mass radius is not significant inside the deuteron.

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Section: Discussion and Summarysupporting

confidence: 66%

The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target

Han,

Xie,

Kou

et al. 2022

Preprint

Self Cite

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“…Can this effect be measured? See [7] for a perspective. A 0.11 fm increase is actually a rather large effect, but the increase is much smaller at the edge of the nucleus.…”

Section: H O R X G 5 T P H 8 a F E 5 W + G 6 4 8 V < / L A T E X I T ...mentioning

confidence: 99%

“…Recent reviews are in Refs. [5,6], and a recent update with many references is [7]. The present manuscript aims to present a new approach to medium modification of the nucleon wave function that is related both to experiment and to lattice QCD calculations.…”

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confidence: 99%

Confinement in Nuclei and the Expanding Proton

Miller

2019

Phys. Rev. Lett.

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High-precision knowledge of electromagnetic form factors of nuclei is a subject of much current experimental and theoretical activity in nuclear and atomic physics. Such precision mandates that effects of the non-zero spatial extent of the constituent nucleons be handled in a manner that goes beyond the usual impulse approximation. A series of simple, Poincare-invariant, composite-proton models that respect the Ward-Takahashi identity and in which quarks are confined are used to study the validity of this approximation. The result of all of the models is a general theorem showing that medium modification of proton structure must occur. Combining this result with lattice QCD calculations leads to a conclusion that a bound proton must be larger than a free one.

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“…test the flavor dependence of anti-shadowing and EMC effects, which remains an open question (see Refs. [3,[63][64][65][66][67][68][69][70][71][72]). We reserve these studies for future work.…”

Section: Unstable Fitsmentioning

confidence: 99%

Charm jets as a probe for strangeness at the future Electron-Ion Collider

Arratia,

Furletova,

Hobbs

et al. 2020

Preprint

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We explore the feasibility of the measurement of charm-jet cross sections in charged-current deepinelastic scattering at the future Electron-Ion Collider. This channel provides clean sensitivity to the strangeness content of the nucleon in the high-x region. We estimate charm-jet tagging performance with parametrized detector simulations. We show the expected sensitivity to various scenarios for strange parton distribution functions. We argue that this measurement will be key to future QCD global analyses, so it should inform EIC detector designs and luminosity requirements.

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Flavor-dependent EMC effect from a nucleon swelling model

Cited by 8 publications

References 79 publications

The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target

The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target

Confinement in Nuclei and the Expanding Proton

Charm jets as a probe for strangeness at the future Electron-Ion Collider

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