Experimental Evidence for Partonic Orbital Angular Momentum at RHIC

Journal Article · Wed Dec 14 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3667297· OSTI ID:22004005

Fields, Douglas E ^[1]

---

1. University of New Mexico, Department of Physics and Astronomy, Albuquerque, NM 871331 (United States)

Although one might naively anticipate that the proton, being the lowest baryonic energy state, would be in a L = 0 state, the current theoretical understanding is that it must carry orbital angular momentum in order, for example, to have a non-zero anomalous magnetic moment. I will review the experimental evidence linked theoretically to orbital angular momentum of the proton's constituents from the RHIC experiments and summarize by presenting a challenge to the theory community--to develop a consistent framework which can explain the spin polarization asymmetries seen at RHIC and elsewhere, and give insight to the partonic wave-functions including orbital angular momentum.

• OSTI ID: 22004005
• Journal Information: AIP Conference Proceedings, Vol. 1418, Issue 1; Conference: PacSPIN2011: 8. Circum-Pan-Pacific symposium on high energy spin physics, Cairns, QLD (Australia), 20-24 Jun 2011; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BROOKHAVEN RHIC
GLUONS
MAGNETIC MOMENTS
ORBITAL ANGULAR MOMENTUM
PARTICLE STRUCTURE
POLARIZATION
PROTONS
QUARKS
SPIN ORIENTATION
WAVE FUNCTIONS