Confinement in Nuclei and the Expanding Proton

Miller, Gerald A.

doi:10.1103/physrevlett.123.232003

Cited by 13 publications

(6 citation statements)

References 58 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

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“…1 + vf of f (x) ) as a first-order Taylor expansion in virtuality; see Ref. [23] for additional discussion.…”

Section: Introductionmentioning

confidence: 99%

Short-Range Correlations and the Nuclear EMC Effect in Deuterium and Helium-3

Segarra,

Pybus,

Hauenstein

et al. 2020

Preprint

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The EMC effect in deuterium and helium-3 is studied using a convolution formalism that allows isolating the impact of high-momentum nucleons in short-ranged correlated (SRC) pairs. We assume that the modification of the structure function of bound nucleons is given by a universal (i.e. nucleus independent) function of their virtuality, and find that the effect of such modifications is dominated by nucleons in SRC pairs. This SRC-dominance of nucleon modifications is observed despite the fact that the bulk of the nuclear inelastic scattering cross-section comes from interacting with lowmomentum nucleons. These findings are found to be robust to model details including nucleon modification function parametrization, free nucleon structure function and treatment of nucleon motion effects. While existing data cannot discriminate between such model details, we present predictions for measured, but not yet published, tritium EMC effect and tagged nucleon structure functions in deuterium that are sensitive to the neutron structure functions and bound nucleon modification functions.

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“…In the calculations of Ref. [52], the bound proton in the nucleus is found to be larger than a free proton. With the assumption of a similar statistical precision as obtained by the H1 result [51], the 10% difference in the slope parameter of t will result in a 3σ significant different source distribution.…”

Section: Resultsmentioning

confidence: 88%

Probing short-range correlations in the deuteron via incoherent diffractive $J/ψ$ production with spectator tagging at the EIC

Tu,

Jentsch,

Baker

et al. 2020

Preprint

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Understanding the role of Quantum Chromodynamics in generating nuclear forces is important for uncovering the mechanism of short-ranged nuclear interactions and their manifestation in short range correlations (SRC). The future Electron-Ion-Collider (EIC) at Brookhaven National Laboratory in the US will provide an unprecedented opportunity to systematically investigate the underlying physics of SRC for energies and kinematic regions that are otherwise impossible to reach. We study SRCs in electron-deuteron scattering events using the Monte Carlo event generator BeAGLE. Specifically, we investigate the sensitivity of observables to high internal nucleon momentum in incoherent diffractive J/ψ vector meson production. In a plane wave impulse approximation, the initial state deuteron wavefunction can be accessed directly from the four-momentum of the spectator nucleon. We use realistic physics simulations and far-forward detector simulations of the EIC to fully reveal the physics potential of this exclusive process. In particular, we provide the luminosity and detector requirements necessary to study SRCs in the deuteron at an EIC.

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Confinement in Nuclei and the Expanding Proton

Cited by 13 publications

References 58 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

Short-Range Correlations and the Nuclear EMC Effect in Deuterium and Helium-3

Probing short-range correlations in the deuteron via incoherent diffractive $J/ψ$ production with spectator tagging at the EIC

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