Dynamic versus Static Structure Functions and Novel Diffractive Effects in QCD

Journal Article · Mon Mar 23 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3122202· OSTI ID:21293465

Brodsky, Stanley J ^[1]

---

1. SLAC National Accelerator Laboratory Stanford University, Stanford, CA 94309 (United States) and Institute for Particle Physics and Phenomenology, Durham (United Kingdom)

Initial- and final-state rescattering, neglected in the parton model, have a profound effect in QCD hard-scattering reactions, predicting single-spin asymmetries, diffractive deep inelastic scattering, diffractive hard hadronic reactions, the breakdown of the Lam Tung relation in Drell-Yan reactions, and nuclear shadowing and non-universal antishadowing--leading-twist physics not incorporated in the light-front wavefunctions of the target computed in isolation. I also discuss the use of diffraction to materialize the Fock states of a hadronic projectile and test QCD color transparency, and anomalous heavy quark effects. The presence of direct higher-twist processes where a proton is produced in the hard subprocess can explain the large proton-to-pion ratio seen in high centrality heavy ion collisions. I emphasize the importance of distinguishing between static observables such as the probability distributions computed from the square of the light-front wavefunctions versus dynamical observables which include the effects of rescattering.

• OSTI ID: 21293465
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1105; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B QUARKS
BREAKDOWN
C QUARKS
COLOR MODEL
COMPTON EFFECT
DEEP INELASTIC SCATTERING
DRELL MODEL
HEAVY ION REACTIONS
PARTICLE PRODUCTION
PIONS
PROTONS
QUANTUM CHROMODYNAMICS
RESCATTERING
SPIN
STRUCTURE FUNCTIONS
T QUARKS
WAVE FUNCTIONS