Kaliardá

Friar, Kimon; Petropoúlou, Ilía

doi:10.2307/40126707

Cited by 2 publications

(3 citation statements)

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“…Here we present the first phenomenological analysis of existing data to determine ρ(b) for the neutron and proton. The results for the neutron contradict the longstanding notion, derived from both gluon-exchange and meson-cloud models [6,7], that the non-vanishing charge density at the center of the neutron is positive.…”

contrasting

confidence: 52%

“…If the neutron is sometimes a proton surrounded by a negatively charged pionic cloud, one would expect to obtain a positive central density [7]. Another mechanism involving correlations in the nucleonic wave function induced by one gluon exchange would also lead to a positive central density because the interaction between two identical d quarks [6] is repulsive. The values of the integral of Eq.…”

mentioning

confidence: 99%

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Charge Densities of the Neutron and Proton

2007

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A model-independent analysis of the infinite-momentum-frame charge density of partons in the transverse plane is presented for the nucleon. We find that the neutron parton charge density is negative at the center, so that the square of the transverse charge radius is positive, in contrast with many expectations. Additionally, the proton's central u quark charge density is larger than that of the d quark by about 70%. The proton (neutron) charge density has a long range positively (negatively) charged component.

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confidence: 52%

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confidence: 99%

Charge Densities of the Neutron and Proton

2007

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“…This was evaluated more recently using the cloudy bag model [15]. Another idea is that the repulsive one-gluon-exchange interaction between 2d quarks favors configurations with a positively charged u quark at the center [16,17,18]. Both models suggest that the central region of the neutron is positively charged and both provide a function G n E (Q 2 ) that rises a the value of Q 2 increases from 0.…”

Section: Model Independent Transverse Charge Densitymentioning

confidence: 99%

Overview of nucleon structure

Miller¹,

Credé²,

Eugenio³

et al. 2010

AIP Conference Proceedings

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Abstract. The quark-gluon properties of the nucleon are probed by a host of recent and planned experiments. These involve elastic, deep-inelastic, semi-inclusive deep-inelastic (SIDIS), and deeply-virtual Compton scattering. A light-front description is naturally applied to interpret all of these processes. The advantages of this approach will be discussed The talk will then focus on the transverse charge and magnetization densities of the nucleons and the use of SIDIS to reveal the non-spherical shape of the nucleon. We find that the central charge density of the neutron is negative, that the magnetization density of the proton extends further in space than the charge distribution, and that the shape of the nucleon, as measured by the spindependent density, is not spherical.

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Kaliardá

Cited by 2 publications

References 0 publications

Charge Densities of the Neutron and Proton

Charge Densities of the Neutron and Proton

Overview of nucleon structure

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