Interplay of Spin and Orbital Angular Momentum in the Proton

Thomas, A. W.

doi:10.1103/physrevlett.101.102003

Cited by 112 publications

(134 citation statements)

References 42 publications

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“…The Regge terms include a component that [48], the model calculation in Ref. [49], the model dependent analysis including Transverse Momentum Distributions (TMDs) data of Ref. [50], and the most recent lattice QCD evaluation [51,52].…”

Section: Discussionmentioning

confidence: 99%

“…Finally, using the parameters from our analysis of the flavor dependence of the proton form factors we can make a prediction for the values of the quarks total angular momentum, J q , q = u, d. J q is defined in Ji's sum rule as [9], [48], from a model calculation [49], from a model dependent analysis including Transverse Momentum Distributions (TMDs) data [50], and from the most recent lattice QCD evaluation [51,52].…”

Section: Flavor Dependent Angular Momentummentioning

confidence: 99%

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Interpretation of the flavor dependence of nucleon form factors in a generalized parton distribution model

et al. 2013

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We give an interpretation of the u and d quarks contributions to the nucleon electromagnetic form factors for values of the four-momentum transfer in the multi-GeV region where flavor separated data have been recently made available. The data show, in particular, a suppression of d quarks with respect to u quarks at large momentum transfer. This trend can be explained using a reggeized diquark model calculation of generalized parton distributions, thus providing a correlation between momentum and coordinate spaces, both of which are necessary in order to interpret the partonic substructure of the form factors. We extend our discussion to the second moments of generalized parton distributions which are believed to contribute to partonic angular momentum.

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Section: Discussionmentioning

confidence: 99%

Section: Flavor Dependent Angular Momentummentioning

confidence: 99%

Interpretation of the flavor dependence of nucleon form factors in a generalized parton distribution model

et al. 2013

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“…Results on the angular momenta for u and d quarks. Data are from the combined analyses [18,46,59] and from [81][82][83][84][85][86][87].…”

Section: Ji's Sum Rulementioning

confidence: 99%

Status of DVMP, DVCS and GPDs

Kroll

2015

EPJ Web of Conferences

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Abstract. The analysis of exclusive meson leptoproduction (DVMP) within the handbag approach is reviewed and the parametrization of the generalized parton distributions (GPDs) is discussed in some detail with the main interest focused of the GPDs H and E. Applications of the GPDs extracted from DVMP to other hard exclusive processes as for instance deeply virtual Compton scattering (DVCS) and an evaluation of Ji's sum rule are also presented.

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“…The interpretation of the lattice QCD result requires, however, an evolution from the characteristic lattice scale determined by the inverse lattice spacing, Q ∼ 1/a, down to lower Q. This appears to resolve the puzzle as pointed out in [20].…”

mentioning

confidence: 87%

Low-energy QCD and hadronic structure

Weise

2009

Nuclear Physics A

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Recent developments and selected topics in low-energy QCD are summarized, from chiral effective field theory to systems with strange and charm quarks, from lattice QCD to precision experiments.1. Prelude: scales and symmetry breaking patterns 4.2 GeV, m t 174 GeV). The low-energy, long wavelength limit of QCD is expressed in terms of different types of effective field theories, depending on the quark masses involved: i) Low-energy QCD with light quarks is realized in the form of an effective field theory with spontaneously broken chiral symmetry, expanded around the (chiral) limit of massless quarks. The active degrees of freedom are the Nambu-Goldstone bosons of this spontaneously broken symmetry, identified with the lightest pseudoscalar mesons. The small expansion parameters are the quark masses, m q , together with low energy/momentum as compared to the characteristic chiral symmetry breaking scale, 4πf π ∼ 1 GeV (with the pion decay constant f π 0.09 GeV).ii) Low-energy QCD with heavy quarks is also realized in the form of an effective field theory, non-relativistic QCD, in which a systematic expansion is now controlled by the inverse quark mass, 1/m Q . This expansion is valid for the heaviest (b-and t-) quarks and,

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Interplay of Spin and Orbital Angular Momentum in the Proton

Cited by 112 publications

References 42 publications

Interpretation of the flavor dependence of nucleon form factors in a generalized parton distribution model

Interpretation of the flavor dependence of nucleon form factors in a generalized parton distribution model

Status of DVMP, DVCS and GPDs

Low-energy QCD and hadronic structure

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