Measurements of the electric and magnetic form factors of the proton from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">Q</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>=1.75 to 8.83 (GeV/<i>c</i><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></

Lung, A.; Lm, Stuart; Pe, Bosted; Andivahis, L.; Alster, J.; Rg, Arnold; Cc, Chang; Fs, Dietrich; Wr, Dodge; Gearhart, R.; Gómez, J.; Griffioen, K. A.; Rs, Hicks; Hyde‐Wright, C. E.; Keppel, C.; Se, Kuhn; Lichtenstadt, J.; Ra, Miskimen; Ga, Peterson; Gg, Petratos; Se, Rock; Sh, Rokni; Sakumoto, W. K.; Spengos, M.; Swartz, K. B.; Szalata, Z. M.; Lh, Tao

doi:10.1103/physrevlett.68.3841

Cited by 75 publications

(32 citation statements)

References 23 publications

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“…The local duality ansatz, equivalent to fixing the form of a soft wave function, was used to estimate the soft contribution in the case of the proton magnetic form factor [16]. The results agree with available data [17], [18] over a wide region, 3 GeV 2 < ∼ Q 2 < ∼ 20 GeV 2 . Furthermore, the calculation of ref.…”

Section: Introductionsupporting

confidence: 62%

Quark-hadron duality and γ∗p → Δ form factors

Belyaev

Radyushkin

1995

Physics Letters B

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We use local quark-hadron duality to estimate the purely nonperturbative soft contribution to the γ * p → ∆ form factors. Our results are in agreement with existing experimental data. We predict that the ratio G * E (Q 2 )/G * M (Q 2 ) is small for all accessible Q 2 , in contrast to the pQCD expectations that G * E (Q 2 ) → −G * M (Q 2 ). * On leave of absence f rom IT EP, 117259 Moscow, Russia.

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Section: Introductionsupporting

confidence: 62%

Quark-hadron duality and γ∗p → Δ form factors

Belyaev

Radyushkin

1995

Physics Letters B

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“…Using such a method where one evaluates the elastic electron-proton amplitude expanded in powers of 1/c 2 , corrections to the energy levels of the hydrogen atom due to the finite size of the proton have been evaluated [16,17]. The FSE are included through the elastic electromagnetic form factors obtained from electron proton scattering cross sections [18,19]. The electromagnetic form factors as such are an essential part of the description of the properties of the nucleon as they incorporate the probability for a nucleon to absorb a virtual photon of four momentum squared q 2 = (q 0 ) 2 −(q) 2 and probe its interior.…”

Section: Introductionmentioning

confidence: 99%

Lorentz contracted proton

Fierro

Kelkar

Nowakowski

2015

J. High Energ. Phys.

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Abstract:The proton charge and magnetization density distributions can be related to the well known Sachs electromagnetic form factors G E,M (q 2 ) through Fourier transforms, only in the Breit frame. The Breit frame however moves with relativistic velocities in the Lab and a Lorentz boost must be applied before extracting the static properties of the proton from the corresponding densities. Apart from this, the Fourier transform relating the densities and form factors is inherently a non-relativistic expression. We show that the relativistic corrections to it can be obtained by extending the standard Breit equation to higher orders in its 1/c 2 expansion. We find that the inclusion of the above corrections reduces the size of the proton as determined from electron proton scattering data by about 4%.

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“…For large momentum transfer (≥ 8.8 GeV 2 ) only the magnetic form factor of the proton has been determined because the contribution of the electric one is suppressed in the cross section by 1/Q 2 . In a recent SLAC experiment [2] the electric and magnetic form factors of the proton have been measured separately in the Q 2 range from 1.75 GeV 2 to 8.83 GeV 2 . The data on the neutron form factors is very poor at large momentum transfer.…”

Section: Introductionmentioning

confidence: 99%

Virtual Compton scattering off protons at moderately large momentum transfer

1996

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The amplitudes for virtual Compton scattering off protons are calculated within the framework of the diquark model in which protons are viewed as being built up by quarks and diquarks. The latter objects are treated as quasi-elementary constituents of the proton. Virtual Compton scattering, electroproduction of photons and the Bethe-Heitler contamination are discussed for various kinematical situations. We particularly emphasize the rôle of the electron asymmetry for measuring the relative phases between the virtual Compton and the Bethe-Heitler amplitudes. It is also shown that the model is able to describe very well the experimental data for real Compton scattering off protons.

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Measurements of the electric and magnetic form factors of the proton fromQ2=1.75 to 8.83 (GeV/c)2

Cited by 75 publications

References 23 publications

Quark-hadron duality and γ∗p → Δ form factors

Quark-hadron duality and γ∗p → Δ form factors

Lorentz contracted proton

Virtual Compton scattering off protons at moderately large momentum transfer

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