Towards an understanding of nucleon spin structure: from hard to soft scales
arXiv:hep-ph/0606269 · doi:10.1142/S0217751X06034033
Abstract
The workshop "The Helicity Structure of the Nucleon" (BNL June 5, 2006) was organized as part of the 2006 RHIC & AGS Users' Meeting to review the status of the spin problem and future directions. The presentations can be found at http://www.phenix.bnl.gov/WWW/publish/caidala/UsersHelicityWorkshop2006/ . Recent data suggests small polarized glue and strangeness in the proton. Here we present a personal summary of the main results and presentations. What is new and exciting in the data, and what might this tell us about the structure of the proton ?
arXiv comment20 pages, to appear in Int. J. Mod. Phys. A
References in corpus (45)
- Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
- Constituent Quarks and g_1
- Models for the Polarized Parton Distributions of the Nucleon
- The theory and phenomenology of polarized deep inelastic scattering
- Precision Determination of the Neutron Spin Structure Function g1n
- QCD Constrains on the Shape of Polarized Quark and Gluon Distributions
- Prospects for Spin Physics at RHIC
- QCD Analysis of Polarized Deep Inelastic Data and Parton Distributions
- Small x: Two Pomerons!
- Spin Physics and Polarized Structure Functions
- Measurement of the Deuteron Spin Structure Function g_1^d(x) for 1 (GeV/c)^2 < Q^2 < 40 (GeV/c)^2
- Consistent Analysis of the Spin Content of the Nucleon
- Precision Measurement of the Neutron Spin Asymmetries and Spin-dependent Structure Functions in the Valence Quark Region
- The Spin Structure of the Nucleon
- Measurement of the Spin Asymmetry in the Photoproduction of Pairs of High-pT Hadrons at HERMES
- Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs
- Measurement of the Spin Structure of the Deuteron in the DIS Region
- Precision Measurement of the Neutron Spin Asymmetry and Spin-Flavor Decomposition in the Valence Quark Region
- Study of the Fundamental Structure of Matter with an Electron-Ion Collider
- Sea quark and gluon polarization in the nucleon at NLO accuracy
- Flavor decomposition of the sea quark helicity distributions in the nucleon from semi-inclusive deep-inelastic scattering
- A critique of the angular momentum sum rules and a new angular momentum sum rule
- Status of the Proton Spin Problem
- The (alpha_s)^3 approximation of Quantum Chromodynamics to the Ellis-Jaffe sum rule
- SU(3) Breaking Effects in Hyperon Semi-Leptonic Decays and the extraction of F and D
- The Spin Dependence of Diffractive Processes and Implications for the Small Behaviour of and the Spin Content of the Nucleon
- Perturbative Evolution and Regge Behaviour
- Gluons and the eta' nucleon coupling constant
- Mid-Rapidity Direct-Photon Production in p+p Collisions at sqrt(s) = 200 GeV
- Perturbative QCD and Regge theory: closing the circle
- Mesonic Corrections to the Shape of Quark Distributions
- Topological Charge Screening and the `Proton Spin' Beyond the Chiral Limit
- Polarized parton distributions from charged-current deep-inelastic scattering and future neutrino factories
- The small behaviour of
- First Measurement of Form Factors of the Decay Xi0->Sigma+ e- anti-nu/e
- Improved Measurement of Double Helicity Asymmetry in Inclusive Midrapidity pi^0 Production for Polarized p+p Collisions at sqrt(s)=200 GeV
- Can the polarization of the strange quarks in the proton be positive ?
- The Spin and Flavour Dependence of High-Energy Photoabsorption
- Heavy-quark axial charges to non-leading order
- A polarised QCD condensate: nu p elastic scattering as a probe of U_A(1) dynamics
- The Spin Structure of the Proton and Polarized Collider Physics
- Gluon Virtuality and Heavy Sea Quark Contributions to the Spin-Dependent g_1 Structure Function
- Transverse Momentum in Semi-Inclusive Polarized Deep Inelastic Scattering and the Spin-Flavor Structure of the Proton
- g_1 at low x and low Q^2 with Polarized ep Colliders
- Hadron Spin Dynamics