Measurement of elastic electron-neutron scattering and inelastic electron-deuteron scattering cross sections at high momentum transfer

Rock, S. E.; Arnold, R. G.; Bosted, P.; Chertok, B. T.; Mecking, B. A.; Schmidt, Iván; Szalata, Z. M.; York, R. C.; Zdarko, R. W.

doi:10.1103/physrevd.46.24

Cited by 62 publications

(39 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results are shown in Fig. 3 (shaded area) in comparison with available data [22]. From this figure we see that the measured values of σ n /σ p enter the estimated range already at…”

Section: Introductionsupporting

confidence: 57%

Neutron form factor: Sudakov suppression and intrinsic transverse size effect

et al. 1995

View full text Add to dashboard Cite

Two recently proposed concepts to improve the perturbative calculation of exclusive amplitudes, gluonic radiative corrections (Sudakov factor) and confinement size effects (intrinsic transverse momentum) are combined to study the neutron magnetic form factor in the space-like region. We find that nucleon distribution amplitudes modelled on the basis of current QCD sum rules indicate overlap with the existing data at the highest measured values of momentum transfer. However, sizeable higher-order perturbative corrections (Kfactor) and/or higher-twist contributions cannot be excluded, although they may be weaker than in the proton case. 2In a recent paper [1] we have studied the space-like proton form factor within a theoretical scheme proposed by Li and Sterman [2], which takes into account gluonic radiative corrections in the form of a Sudakov factor [3]. This scheme naturally generalizes the standard hard scattering picture (HSP) of Brodsky and Lepage [4]-commonly used to calculate exclusive reactions within perturbative QCD-by taking into account the transverse momentum of the partons.A major point in our proton form-factor analysis was to show that proper treatment of the α s -singularities demands the imposition of an appropriate infrared (IR) cut-off to render the form-factor calculation both finite and insensitive to the inclusion of the soft region of phase space. This is in contrast to the pion case [2], where a "natural" IR cut-off appears in the form of the interquark separation. Considering in detail optional IR cut-off prescriptions [5][6][7], we found that maximum IR protection is provided by introducing as a common IR cut-off in the Sudakov (suppression) factor the maximum interquark separation ("MAX" prescription [1]). The underlying physical idea is the following: One expects that because of the color neutrality of a hadron, its quark distribution cannot be resolved by gluons with a wavelength much larger than a characteristic interquark separation scaleb l .Thus, gluons with wavelengths large compared to the (transverse) hadron size probe the hadron as a whole, i.e., in a color-singlet state and decouple. As a result, quarks in such configurations act coherently and therefore (soft) gluon radiation is dynamically inhibited.The "MAX" presription not only suffices to suppress the α s -singularities, but also preserves the finiteness of the integrand of the expression for the form factor, even when renormalization-group (RG) evolution of the wave function is included. An additional bonus of the "MAX" prescription is that the proton form factor saturates, i.e., becomes insensitive to the contributions from large transverse separations. Admittedly, little confidence is put in perturbative treatments of the large-distance region, so that saturation of the form factor at transverse distances as low as possible is a prerequisite for a self-consistent perturbative calculation.In [1] we have pointed out that the recent numerical analysis by Li [5] of the proton 3 form factor has serious drawbacks...

show abstract

“…The results are shown in Fig. 3 (shaded area) in comparison with available data [22]. From this figure we see that the measured values of σ n /σ p enter the estimated range already at…”

Section: Introductionsupporting

confidence: 57%

Neutron form factor: Sudakov suppression and intrinsic transverse size effect

et al. 1995

View full text Add to dashboard Cite

show abstract

“…For Ref. [103], a later analysis [70] provided updated values of the ratio σ n /σ p , but not updated G n M values. We correct the quoted G n M values from the original publications to account for the updated σ n /σ p analysis, and apply a correction (from 0.6-1.4% on G n M ) to account for the fact that the original analysis assumed G n E = 0.…”

Section: G N M Datamentioning

confidence: 99%

Proton and neutron electromagnetic form factors and uncertainties

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Data for the ratio GEp/GMp are from [92] (blue open triangles), [9] (red solid squares), [8] (blue solid circles), and [100] (green solid triangles). The data for GMn are from [131] (red solid circles), [132] (red solid squares), [76] (open triangles), [77] (green open stars), [72] (open squares), [313] (solid triangles), and [314] (blue solid stars). The data for GEn are from double polarization experiments at MAMI [41,42,111,118,119] (red solid circles), NIKHEF [40] (green solid triangle), and JLab [31,112,32] (blue solid squares).…”

Section: Generalized Parton Distributionsmentioning

confidence: 99%

The structure of the nucleon: Elastic electromagnetic form factors

et al. 2015

View full text Add to dashboard Cite

Precise proton and neutron form factor measurements at Jefferson Lab, using spin observables, have recently made a significant contribution to the unraveling of the internal structure of the nucleon. Accurate experimental measurements of the nucleon form factors are a test-bed for understanding how the nucleon's static properties and dynamical behavior emerge from QCD, the theory of the strong interactions between quarks. There has been enormous theoretical progress, since the publication of the Jefferson Lab proton form factor ratio data, aiming at reevaluating the picture of the nucleon. We will review the experimental and theoretical developments in this field and discuss the outlook for the future.PACS. PACS-key 13.40.Gp -PACS-key 13.85.Dz

show abstract

Measurement of elastic electron-neutron scattering and inelastic electron-deuteron scattering cross sections at high momentum transfer

Abstract: We have measured inelastic electron-deuteron, electron-proton, and electron-aluminum cross sections at 10' in the kinematic region between

Cited by 62 publications

References 92 publications

Neutron form factor: Sudakov suppression and intrinsic transverse size effect

Neutron form factor: Sudakov suppression and intrinsic transverse size effect

Proton and neutron electromagnetic form factors and uncertainties

The structure of the nucleon: Elastic electromagnetic form factors

Contact Info

Product

Resources

About