Interplay of Hard and Soft Processes at Jlab Energies

Afanasev, Andrei; Carlson, Carl E.

doi:10.1142/9789812705167_0005

Cited by 31 publications

(56 citation statements)

References 13 publications

(17 reference statements)

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“…One experi-ment will measure the ratio of the e − p and e + p cross sections, which determines directly the real part of the two-photon amplitude [Afa04]. Another experiment will measure the ratio…”

Section: Discussion Of the Form Factor Datamentioning

confidence: 99%

Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

473

583

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There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has been greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at MIT-Bates, MAMI, and JLab. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

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Section: Discussion Of the Form Factor Datamentioning

confidence: 99%

Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

473

583

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“…The analysis [37,[44][45][46] of sub-leading single-spin asymmetries observed at HERMES [16] and later on at JLab [18] led to the introduction of a complete set of twist-3 distribution functions [33,47]. Observation of the SSA in pion SIDIS has opened a new avenue to study the spin-orbit correlations and quark-gluon interactions, triggering studies of SSAs worldwide.…”

Section: Spin-azimuthal Asymmetriesmentioning

confidence: 99%

Structure and spin of the nucleon

Avakian

2014

EPJ Web of Conferences

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Abstract.Parton distribution functions, describing longitudinal momentum, helicity and transversity distributions of quarks and gluons, have been recently generalized to account also for transverse degrees of freedom. Two new sets of more general distributions, Transverse Momentum Distributions and Generalized Parton Distributions, were introduced to describe transverse momentum and space distributions of partons. Great progress has been made since then in measurements of different Single Spin Asymmetries (SSAs) in semi-inclusive and hard exclusive processes providing access to TMDs and GPDs, respectively. Facilities world-wide involved in studies of the 3D structure of nucleon include HERMES, COMPASS, BELLE, BaBar, Halls A, B, and C at JLab, and PHENIX and STAR at RHIC (BNL). TMD studies in the Drell-Yan process are also becoming an important part of the program of hadron scattering experiments. Studies of TMDs are also among the main driving forces of the JLab 12-GeV upgrade project, several of the forward upgrade proposals of STAR and PHENIX at RHIC, and future facilities, such as the Electron Ion Collider (EIC), FAIR in Germany, and NICA in Russia. In this contribution we present an overview of the latest developments in studies of parton distributions and discuss newly released results, ongoing activities, as well as some future measurements.

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“…[11] was extended to the twist-3 case [20]. In this work, A LU was computed from the Feynman diagrams in Fig.…”

Section: Longitudinal Single Spin Asymmetries In Dismentioning

confidence: 99%

“…In [20,21] the spectator model calculation for SSA in semi-inclusive DIS of Ref. [11] has been extended to the case of a longitudinally polarized lepton beam and a longitudinally polarized target.…”

Section: Introductionmentioning

confidence: 99%

Recent progress in the understanding of single spin asymmetries

Metz¹,

Schlegel²

2004

Ann. Phys.

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Dedicated to Klaus Goeke on the occasion of his 60th birthday.Over the past years a lot of progress has been made in the understanding of single spin asymmetries in hard scattering processes. We briefly review this subject, covering the non-vanishing of time-reversal odd parton distributions, universality of fragmentation functions, and the discovery of previously unknown timereversal odd parton distributions at subleading twist. Interestingly enough, all these developments were initiated by simple model calculations.

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Interplay of Hard and Soft Processes at Jlab Energies

Cited by 31 publications

References 13 publications

Nucleon electromagnetic form factors

Nucleon electromagnetic form factors

Structure and spin of the nucleon

Recent progress in the understanding of single spin asymmetries

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