Novel Nuclear Effects in QCD: Non-Universality of Nuclear Antishadowing and Hidden Color Phenomena

Conference · Thu Jun 30 00:00:00 EDT 2005

OSTI ID:881154

Brodsky, Stanley J

The shadowing and antishadowing of nuclear structure functions in the Gribov-Glauber picture is due to the destructive and constructive interference of amplitudes arising from the multiple-scattering of quarks in the nucleus, respectively. The diffractive contributions to deep inelastic scattering includes Pomeron and Odderon contributions from multi-gluon exchange as well as Reggeon quark-exchange contributions. The coherence of multi-step nuclear processes leads to shadowing and antishadowing of the electromagnetic nuclear structure functions in agreement with measurements. This picture also leads to substantially different antishadowing for charged and neutral current reactions, thus affecting the extraction of the weak-mixing angle {Theta}{sub W}. The fact that Reggeon couplings depend on the quantum numbers of the struck quark implies non-universality of nuclear antishadowing for charged and neutral currents as well as a dependence of antishadowing on the polarization of the beam and target. The implications of hidden color degrees of freedom in the nuclear wavefunction is also briefly discussed.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 881154
• Report Number(s): SLAC-PUB-11305
• Conference Information: 13th International Workshop on Deep Inelastic Scattering (DIS 05), Madison, Wisconsin, 27 Apr - 1 May 2005
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
COLOR
DEEP INELASTIC SCATTERING
DEGREES OF FREEDOM
MULTIPLE SCATTERING
NEUTRAL CURRENTS
NUCLEAR STRUCTURE
POLARIZATION
POMERANCHUK PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM NUMBERS
QUARKS
Theory-Nucl
Phenomenology-HEP
HEPPH
HEPTH