Generalized parton distributions and the structure of the nucleon

Boffi, Sigfrido; Pasquini, Barbara

doi:10.48550/arxiv.0711.2625

Cited by 55 publications

(71 citation statements)

References 193 publications

(359 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[46], and model Ref. [7] calculations. It should be remarked that the t-dependence in the GPD model follows closely what was found for the unpolarized case, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…They parameterize the nucleon vertex in the process depicted in Fig. 1a in terms of three kinematical invariants, besides the initial photon's virtuality, Q 2 : the longitudinal momentum transfer, ζ = Q 2 /2(P q), the four-momentum transfer squared, ∆ 2 = −t, and the variable X = (kq)/(P q), representing the Light Cone (LC) momentum fraction carried by the struck parton with momentum k (see [5,6,7]) for reviews). 1 As initially pointed out in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In the transverse plane in coordinate space, κ q is a measure of an unpolarized quark's displacement along the y-axis in a proton polarized along the x-axis [4]. κ q T , the transverse anomalous moment, measures the y-transverse displacement for a transversely polarized quark along the x-axis in an unpolarized proton [7,10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nucleon Tensor Charge from Exclusive $π^o$ Electroproduction

Ahmad,

Goldstein,

Liuti

2008

Preprint

View full text Add to dashboard Cite

Exclusive π o electroproduction from nucleons is suggested for extracting the tensor charge and other quantities related to transversity from experimental data. This process isolates C-parity odd and chiral odd combinations of t-channel exchange quantum numbers. In a hadronic picture it connects the meson production amplitudes to C-odd Regge exchanges with final state interactions. In a description based on partonic degrees of freedom, the helicity structure for this C-odd process relates to the quark helicity flip, or chiral odd generalized parton distributions. This differs markedly from deeply virtual Compton scattering, and both vector meson and charged π electroproduction, where the axial charge can enter the amplitudes. Contrarily the tensor charge enters the π o process. The connection through the helicity description of the process to both the partonic and hadronic perspectives is studied and exploited in model calculations to indicate how the tensor charge and other transversity parameters can be related to cross section and spin asymmetry measurements over a broad range of kinematics.

show abstract

“…[46], and model Ref. [7] calculations. It should be remarked that the t-dependence in the GPD model follows closely what was found for the unpolarized case, i.e.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nucleon Tensor Charge from Exclusive $π^o$ Electroproduction

Ahmad,

Goldstein,

Liuti

2008

Preprint

View full text Add to dashboard Cite

show abstract

“…Generalized Parton Distributions (GPDs) were introduced two decades ago [1][2][3] and have been since then a topic of strong interest in the hadron physics community, both on the theoretical and experimental side [4][5][6][7][8][9][10]. A significant amount of beam time of the upgraded Jefferson Laboratory facility is dedicated to their experimental study and they are one of the core scientific cases for building the U.S. Electron-Ion Collider (EIC).…”

Section: Introductionmentioning

confidence: 99%

Covariant extension of the GPD overlap representation at low Fock states

et al. 2017

View full text Add to dashboard Cite

We present a novel approach to compute generalized parton distributions within the lightfront wave function overlap framework. We show how to systematically extend generalized parton distributions computed within the DGLAP region to the ERBL one, fulfilling at the same time both the polynomiality and positivity conditions. We exemplify our method using pion lightfront wave functions inspired by recent results of non-perturbative continuum techniques and algebraic nucleon lightfront wave functions. We also test the robustness of our algorithm on reggeized phenomenological parameterizations. This approach paves the way to a better understanding of the nucleon structure from non-perturbative techniques and to a unification of generalized parton distributions and transverse momentum dependent parton distribution functions phenomenology through lightfront wave functions.

show abstract

“…The most common theoretical framework to describe exclusive photo-production of vector quarkonia [29] in the collinear factorisation is based on the introduction of generalised parton distributions (GPDs) [30][31][32][33][34][35][36][37]. In ths section, we derive the relation between the J/ψ STSA and the gluon GPDs.…”

Section: Evaluation Of the Stsas Within The Gpd Formalismmentioning

confidence: 99%

Single-transverse-spin asymmetries in exclusive photo-production of J/ψ in ultra-peripheral collisions in the fixed-target mode at the LHC and in the collider mode at RHIC

et al. 2019

View full text Add to dashboard Cite

We investigate the potentialities offered by the study of J/ψ exclusive photo-production in ultra-peripheral collisions at a fixed-target experiment using the proton and lead LHC beams (generically denoted as AFTER@LHC) on hydrogen targets and at RHIC in the collider mode. We compare the expected counting rates in both set-ups. Studying Single-Transverse-Spin Asymmetries (A N ) in such a process provides a direct path to the proton Generalised Parton Distribution (GPD) E g (x, ξ, t). We evaluate the expected precision on A N for realistic conditions with the LHCb detector in pH ↑ and PbH ↑ collisions. We also discuss prospects with polarised deuterium and helium targets in the case of AFTER@LHC.

show abstract

Generalized parton distributions and the structure of the nucleon

Cited by 55 publications

References 193 publications

Nucleon Tensor Charge from Exclusive $π^o$ Electroproduction

Nucleon Tensor Charge from Exclusive $π^o$ Electroproduction

Covariant extension of the GPD overlap representation at low Fock states

Single-transverse-spin asymmetries in exclusive photo-production of J/ψ in ultra-peripheral collisions in the fixed-target mode at the LHC and in the collider mode at RHIC

Contact Info

Product

Resources

About