Open Questions in High Energy Spin Physics

Abstract

I describe a few of the most exciting open questions in high energy spin physics. After a brief look at (g-2)_μand the muon electric dipole moment, I concentrate on QCD spin physics. Pressing questions include the interpretation of new asymmetries seen in semi-inclusive DIS, measuring the polarized gluon and quark transversity distributions in the nucleon, testing the DHGHY Sum Rule, measuring the orbital angular momentum in the nucleon, and many others which go beyond the space and time allotted for this talk.

11 pp., 1 EPS figure, using LaTeX and BoxedEPS, mymak.tex (supplied), and ws-ijmpa.cls macros. Email correspondence to R.L. Jaffe <[email protected]>. Contribution to Proceedings of Pacific Spin 2001

References in corpus (6)

• Hadronic light-by-light corrections to the muon g-2: the pion-pole contribution
• Hadronic light-by-light scattering contribution to the muon g-2: an effective field theory approach
• Pion pole contribution to hadronic light-by-light scattering and muon anomalous magnetic moment
• Theoretical Expectations for the Muon's Electric Dipole Moment
• On the theoretical uncertainties in the muon anomalous magnetic moment
• Supersymmetric Relations Among Electromagnetic Dipole Operators

Cited by in corpus (5)

• X(1835) as the Lowest Mass Pseudoscalar Glueball and Proton Spin Problem
• Generation of polarized particle beams at relativistic laser intensities
• Control of electron beam polarization in the bubble regime of laser-wakefield acceleration
• Probing gluon helicity distribution and quark transversity through hyperon polarization in singly polarized pp collisions
• Simulation of Polarized Beams from Laser-Plasma Accelerators